Amsoil Lubricants

Clings Tenaciously to Parts
Because building an engine can take from a few days to many months, using an engine assembly lube that clings well to parts for extended periods is critical. AMSOIL Engine Assembly Lube is formulated with a high-viscosity base oil and a unique tackifier for long-lasting, tenacious cling.

Exceptional Wear Protection
During initial startup, engines operate momentarily with little-to-no oil pressure, placing camshaft lobes, lifters, rocker arms, bearings and other critical parts at high risk of wear and failure. In addition to inhibiting wear by clinging to parts, AMSOIL Engine Assembly Lube contains high levels of antiwear additives for further protection.

Inhibits Rust and Corrosion
An engine can sit in a garage partially assembled for long periods, allowing moisture and oxygen to form rust on exposed metal surfaces. AMSOIL Assembly Lube contains rust and corrosion inhibitors that protect engine components during inactivity.

Dissolves in Oil
Grease-based assembly lubes can increase the risk of oil port clogging if the grease is not fully consumed at initial startup, potentially causing engine failure. AMSOIL Engine Assembly Lube is designed to dissolve in oil, helping oil ports remain clean, and helping to eliminate deposit formation under the valve covers and in the oil pan.

Easy and Precise Application
AMSOIL Assembly Lube is packaged in convenient 4-oz. tubes, allowing for cleaner, more precise application compared to other products.

APPLICATIONS
AMSOIL Engine Assembly Lube is recommended for any new or rebuilt four-stroke engine, including racing and performance engines, and should be applied to all areas of the engine susceptible to initial startup wear.

• Tenaciously Clings to Parts
• High in Anti-Wear Additives
• Dissolves in Oil
• Provides Rust & Corrosion Protection
• Recommended for all Four-Stroke Engines, Including High-Performance and Racing Engines

HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS). An MSDS is available via the Internet at www.amsoil.com or upon request at (715) 392-7101. Keep Out of Reach of Children. Don't pollute. Return used oil to collection centers.

Performance Features

• Provides a protective layer of armor against mud, dirt and snow
• Eases clean-up after riding
• Restores, cleans and shines plastic, fiberglass and painted surfaces
• Provides a protective layer to counteract the damaging effects of UV rays
• Pleasant cherry scent

Directions

1. Make sure surfaces are clean and dry before applying.
2. Shake well.
3. Spray evenly and liberally on desired surfaces. DO NOT SPRAY ON PEDALS, SEATS, BRAKES OR BRAKE ASSEMBLIES.
4. Allow to dry for 15 minutes. Wipe off excess with a lint-free microfiber towel for a brilliant shine.
5. For an extra barrier against mud and snow, leave wet and do not wipe.

Note: When left wet, product may attract dust.

AMSOIL PRODUCT AVAILABILITY
AMSOIL Mudslinger is available in 12-ounce spray cans.

AMSOIL PRODUCT WARRANTY
AMSOIL products are backed by a Limited Liability Warranty. For complete information visit www.amsoil.com/warranty/.

Disposal
Aerosols may have different disposal requirements than other wastes in your area. Dispose of contents and container in accordance with all federal, state/provincial and local regulations.

Lubricates Top-End Components
The intense heat of combustion and limitations of the oil-control piston ring result in a lack of oil at the top of each cylinder. AMSOIL Upper Cylinder Lubricant's unique additives provide that missing lubrication to fight piston-ring and cylinder wear, maximizing engine compression and horsepower. Its lubricity improvers also aid in protecting fuel injectors and other fuel-system components from wear, helping ensure excellent performance and long-life. AMSOIL Upper Cylinder Lubricant delivers 18 percent more lubricity than Lucas* and 20 percent more than Sea Foam* for better retention of horsepower and fuel economy (see chart below).¹

Inhibits Corrosion
Upper Cylinder Lubricant uses potent corrosion inhibitors to coat metal surfaces, block out moisture and stop deterioration before it starts. This is particularly important when using gasoline that contains ethanol due to its propensity to attract water and hasten corrosion. Inhibiting corrosion maximizes component life and reduces wear in the engine's top-end to guard against compression loss and maintain optimum power.

• Lubricates fuel system and upper cylinders
• Fights ethanol-related corrosion
• Helps keep injectors clean
• Compatible with capless fuel systems

Keeps Injectors Clean
Upper Cylinder Lubricant contains detergent additives designed to maintain injector cleanliness. While AMSOIL P.i. Performance Improver is designed to attack and remove stubborn injector deposits that can reduce power and fuel economy, Upper Cylinder Lubricant helps preserve injector and combustion-chamber cleanliness. Using it with every tank of fuel helps retain fuel-economy and performance gains and maximizes component life.

Capless-Compatible Packaging
Many new vehicles have replaced traditional fuel caps with capless systems. The threads on most bottles restrict them from opening the flap inside the fuel neck and make removing the bottle difficult. The AMSOIL Upper Cylinder Lubricant bottle is fully compatible with capless fuel systems. It's easy to insert, pour and remove the bottle.

RECOMMENDATIONS

• For use with cars and trucks.
• For best results, use with every tank of fuel. Do not refill tank until almost empty.
• Treats up to 25 gallons. Add entire bottle to tank at fill-up.
• Treat large gas tanks with two bottles of Upper Cylinder Lubricant. Using more than two bottles is not recommended.
• Safe for use with catalytic converters, oxygenated gas and E85 fuel.
• Do not use with two-stroke or diesel engines.

AMSOIL PRODUCT WARRANTY
AMSOIL products are backed by a Limited Liability Warranty. For complete information visit www.amsoil.com/warranty/.

HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Safety Data Sheet (SDS). An SDS is available at www.amsoil.com or upon request at (715) 392-7101. Keep Out of Reach of Children.

¹ Based on independent testing of AMSOIL Upper Cylinder Lubricant, Lucas Upper Cylinder Lubricant and Sea Foam Motor Treatment obtained on 02/13/2019 using the ASTM D6079 modified for use with gasoline. *All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are developed by AMSOIL for use in the applications shown.

AMSOIL Signature Series 100% Synthetic Motor Oil is formulated for drivers who demand the absolute best engine protection. Built with advanced synthetic base oils and a precision-engineered additive system, it is designed to control wear, resist volatility and maintain viscosity under extreme heat, pressure and cold-start conditions. The result is uncompromising film strength, cleaner components and protection that pushes beyond industry standards into a class of its own.

Modern engines place unprecedented stress on motor oil through turbocharging, direct injection, higher temperatures and extended service intervals. Signature Series is engineered to meet those challenges head on, delivering more protection, performance and confidence mile after mile, even during extreme use.

2X BETTER Protection Against Volatility

AMSOIL Signature Series delivers 2X better protection against volatility,³ helping reduce oil consumption, minimize top-offs and keep engines cleaner over time.

³Based on AMSOIL Signature Series 0W-20 100% Synthetic Motor Oil compared to the API SQ limit using the ASTM D5800 Noack volatility test.

Guards Against LSPI

Low-speed pre-ignition (LSPI) remains a serious concern in today’s turbocharged, direct-injection engines, where uncontrolled combustion events can damage pistons and other critical components, especially as motor oil ages. AMSOIL Signature Series 100% Synthetic Motor Oil is engineered to help prevent LSPI by maintaining a strong, stable formulation that continues to deliver outstanding performance throughout the drain interval. Even after 25,000 miles of use, Signature Series delivers 4X more piston protection against LSPI⁴ than the industry standard requires.

⁴Using AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil following a 25,000-mile service interval in the Sequence IX aged-oil LSPI test.

Preserves Horsepower and Torque

AMSOIL Signature Series 100% Synthetic Motor Oil is built to help engines run stronger, longer⁵ – helping to protect engines from performance loss throughout their life.

⁵Using Signature Series 100% Synthetic 5W-30 Motor Oil in a 2025 Ford F-150 Raptor in a 125K-mile accumulation study. Based on comparative start- and end-of-test horsepower and torque.

Proven Cleaning Power

In Sequence IIIH testing, AMSOIL Signature Series delivers 72% more protection against piston deposits than required by industry standards,⁶ helping ensure cleaner pistons and consistent performance over time.

⁶Based on AMSOIL Signature Series 5W-30 in the Sequence IIIH Test.

Even after doubling the length of the Sequence IIIH test, Signature Series provided 31% better protection than required,⁷ demonstrating its ability to maintain cleanliness far beyond industry standards.

⁷Based on AMSOIL Signature Series 5W-30 in a double-length Sequence IIIH test.

No Sludge, Just Protection

During a 125K-mile accumulation study on a 2025 Ford F-150 Raptor, the engine experienced 0% oil screen plugging.⁸

⁸As demonstrated in a 125K-mile accumulation study on a 2025 Ford F-150 Raptor which had 0% plugging.

AMSOIL P.i. is a potent gasoline performance improver with concentrated detergent that aggressively cleans stubborn, power-robbing deposits from injectors, valves and the combustion chamber. Effective in port and direct injection systems. Bottle compatible with capless fuel systems. Cleans entire fuel system in one tank of gasoline. For use with cars and trucks. Treats up to 30 gallons. Add entire bottle to tank at fill-up. For best results, clean your fuel system with P.i. every 4,000 miles (6,400 km). Do not use with diesel or two-stroke engines.

See the Product Data Bulletin for full details.

MAXIMUM DEPOSIT CLEAN-UP

• Helps keep valves clean and moving freely.
• Aggressive additives attack the most common forms of engine deposits and limit their effects.

REMOVES FUEL-INJECTOR DEPOSITS

• P.i. removes deposits and keeps injectors functioning as they should.
• Testing shows P.i. restored GDI fuel injectors to a 100% flow rate after one tank of fuel.²

RESTORES HORSEPOWER

• Third-party testing demonstrated performance of P.i. using a 2016 Chevrolet* Silverado* with 100,616 miles on the odometer.
• Following a single treatment with P.i., the truck measured an incredible 14% improvement in horsepower.¹

CLEANS COMBUSTION CHAMBER DEPOSITS

• Fights combustion chamber deposits to help restore power, control knock, increase fuel economy and reduce the need for higher-octane fuels.
• Protects against compression loss, difficulty starting and rough idling.
• Reduces possibility of "carbon rap," when deposit buildup causes the piston to hit the cylinder head.
• Decreases the possibility of pre-ignition "knock" or "pinging."

CAPLESS-COMPATIBLE BOTTLE

• Bottle is fully compatible with capless fuel systems.

¹Based on third-party testing in a 2016 Chevrolet* Silverado* 1500, 5.3L V-8 GDI with 100,616 miles, using one tank treated with AMSOIL P.i. Actual results may vary. 2ASTM D5598(M)-2013 Buick Regal test vehicle.

See the Product Data Bulletin for full details.

SEVERE GEAR is designed for those who demand the best. Engineered with high film strength for high-load demands. Reduces friction and provides the ultimate protection against wear. Excels in extreme temperatures. Helps maintain efficiency and outperforms conventional gear oils. Excellent for all cars and trucks, but especially well-suited for towing, hauling, racing, commercial use or other severe duty.

EXCELS IN TEMPERATURE EXTREMES

• Delivers excellent performance in hot and cold temperature extremes.
• Resists breakdown from high heat, preventing acids and carbon/varnish formation.
• Wax-free construction improves cold-flow properties, improving fuel economy and cold-weather shifting.

MAXIMUM WEAR PROTECTION

• Specifically engineered for maximum performance in severe-duty applications.
• Maintains viscosity for long-lasting protection against metal-to-metal contact.
• Proprietary AMSOIL additives form an iron-sulfide barrier coating on gear surfaces, providing the ultimate line of defense against wear, pitting and scoring.
• Helps prevent "thermal runaway," a phenomenon caused by a lubricant’s inability to control friction and increased heat under high-stress conditions.
• Inhibits rapid lubricant degradation and component damage, helping equipment run better and last longer.

Penetrates to clean fouling and powder residue from all firearm surfaces to help prevent malfunctions, providing dependability when you need it most. Protects stored firearms from corrosion so they remain reliable for generations.

Dependable Firearm Performance

• Penetrates deep into hard-to-reach components
• Effectively cleans fouling and powder residue from all firearm surfaces, reducing misfires and increasing reliability
• Protects guns against corrosion, allowing for safe storage and preserving performance, reliability and value
• Safe to use on all metals, woods, composites and rubbers commonly found in firearms

Purpose-built to help reduce friction and wear so your firearm remains reliable for generations. Designed to prevent malfunctions, providing dependability when you need it most.

Dependable Firearm Performance

• Effectively lubricates and protects firearms, helping extend life and prevent blockage, jams and wear
• Outstanding protection and performance in both hot and cold climates
• Specifically formulated for firearms, offering superior performance
• Safe to use on all metals, woods, composites and rubbers commonly found in firearms

Designed for hard-working vehicles that live in severe service. Handles heat so well, you can confidently double your vehicle manufacturer’s severe-service drain interval with guaranteed AMSOIL protection.

RESERVE PROTECTION AGAINST HEAT AFTER 180,000 MILES

ABOT test performed by independent lab based on total acid number (TAN).

The transmission’s valve body is clean and virtually sludge-free following 180,000 severe-service miles. The clutch plates demonstrated only trace discoloration and earned a rating of "good," the highest possible, for deterioration/wear.

PROTECTS AGAINST THERMAL BREAKDOWN

• Formulated with high concentrations of antioxidants, making it naturally heat resistant.
• Delivers extraordinary cold-flow properties.
• Helps improve shift response, energy efficiency and warm-up times.

See the Product Data Bulletin for full details.

• Designed for hard-working vehicles that live in severe service. Handles heat so well, you can confidently double your vehicle manufacturer’s severe-service drain interval with guaranteed AMSOIL protection.

  RESERVE PROTECTION AGAINST HEAT AFTER 180,000 MILES

  ABOT test performed by independent lab based on total acid number (TAN).

  The transmission’s valve body is clean and virtually sludge-free following 180,000 severe-service miles. The clutch plates demonstrated only trace discoloration and earned a rating of “good,” the highest possible, for deterioration/wear.

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  PROTECTS AGAINST THERMAL BREAKDOWN

  • Formulated with high concentrations of antioxidants, making it naturally heat resistant.
  • After 180,000 miles in severe service, fluid analysis revealed Signature Series Multi-Vehicle Synthetic ATF contained 83 percent of its original oxidation inhibitors.

  See the Product Data Bulletin for full details.

  *All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.

  
  

Unique formula designed for high-performance European vehicles. Precise blend of advanced synthetic base oils and premium additives delivers exceptional protection in extreme conditions. Provides excellent shear resistance, reduced oil consumption and dependable performance so you can confidently push your car to the limit. 

ADVANCED ENGINE PROTECTION

• Delivers 100% synthetic engine protection for high-performance European vehicles.
• Thermally stable oil formulation resists deposit formation and cools turbochargers.
• Formulated for long drain intervals recommended by European automakers.

Complete Coverage

• Shear-stable synthetic base oils and high-quality anti-wear additives.
• Outstanding protection in high-temperature conditions.
• Dependable performance throughout long drain intervals.
• Helps reduce oil consumption in extreme conditions.

Emissions System Protection

• Precisely balanced formulations designed for use with modern exhaust treatment devices.
• Protects sensitive emissions systems with optimal blend of SAPS (sulfated ash, phosphorus, sulfur).
• Carefully crafted in eight varieties to ensure proper emissions system function.

Excellent for Turbochargers

• Robust composition shields engines from high temperatures produced by turbochargers.
• Thermally stable oil formulation resists deposit formation and cools turbochargers.
• Low pour point protects turbochargers against oil starvation in subzero temperatures.

Viscosity breakdown is a real problem with high-viscosity oils subjected to repeated mechanical shearing in tight bearing clearances and between piston rings and cylinder walls. AMSOIL formulates with shear-stable synthetic base oils that resist permanent viscosity loss over long service intervals. A Noack volatility of just 7.1% weight loss (ASTM D5800) is the lowest figure across the entire AMSOIL European Motor Oil lineup. Lower volatility means less oil is burned off as vapor at high temperatures, which directly
translates to reduced oil consumption between changes. For BMW M5 and M6 owners running track sessions or high-speed highway pulls, that measurable reduction in oil burn matters at the dipstick.

Turbocharged applications compound the thermal challenge. Oil flowing through turbocharger bearings can see localized temperatures far exceeding bulk oil temperature, leading to coking and deposit formation that restricts oil flow and shortens turbo life.
AMSOIL 10W-60 resists deposit formation through a thermally stable synthetic formulation with strong oxidation resistance. On the cold side, a pour point of -33 degC (-27.4 degF) means the oil flows to critical components quickly at startup, even in cold European winters. That cold-flow capability protects turbocharger bearings from oil starvation during the critical seconds after ignition when most
turbo wear occurs.

• Multi-viscosity, shear-stable synthetic race formula engineered to maximize power while providing outstanding engine protection. Heavily fortified with zinc and phosphorus additives to protect critical surfaces in extreme conditions. Proprietary friction modifier maximizes power and reduces engine temperatures. Durable additive system is excellent for racing and street engines.

  FIGHTS ENGINE WEAR

  • Durable formulation resists viscosity loss due to mechanical shear to maintain a strong protective oil film.
  • Heavily fortified with zinc and phosphorus anti-wear additives to provide additional protection against scuffing and wear in severe racing conditions.

  MAXIMIZES HORSEPOWER

  • Formulated with a proprietary friction modifier to reduce energy lost to friction.
  • Delivers maximum horsepower and cooler engine temperatures, promoting improved lap times and longer-lasting components.

  EXCELLENT ALL-TEMPERATURE PERFORMANCE

  • Low pour point offers excellent startup protection and provides less drag when the oil has not reached operating temperature.
  • Maintains superior film strength in extreme heat.
  • Thermally stable synthetic chemistry resists the effects of intense heat common to racing engines to provide reliable protection for the duration of the race.

• Helps prevent water-induced ethanol separation and breakdown. Cleans gummed/dirty injectors and carburetors. Cleans carbon deposits to restore engine performance. Protects against formation of gum/varnish buildup in tanks and fuel systems. Designed for use in all two- and four-stroke gasoline-powered engines, including motorcycles, snowmobiles, boats, ATVs/UTVs, edgers, tillers, mowers, snowblowers, chainsaws, generators and farm/construction equipment. One 8-oz. (236-ml) bottle treats up to 6 gallons (23 litres) for cleanup and up to 12 gallons (45 litres) for continued protection. For best protection, use with every tank.

  CLEANS FUEL SYSTEMS

  • Cleans varnish, gum and insoluble debris that clog carburetors, fuel injectors and fuel filters in powersports equipment and small engines.
  • Quickly detaches and carries away fuel-system deposits, while also cleaning hard-to-remove deposits on piston tops, spark plugs and other combustion-chamber parts.
  • Helps reduce pre-ignition, rough idling and poor throttle response, restoring peak performance.

  FIGHTS ETHANOL PROBLEMS

  • Designed to keep water due to ethanol dispersed in tiny molecules throughout the fuel tank, moving it out as a normal part of operation.
  • Helps maintain engine performance and protects against damaging corrosion.
  • Decreases the chance of ethanol separating from the gasoline, helping prevent lean-burn and combustion-chamber damage.

Delivers confidence in your diesel’s performance. Concentrated formula uses unique chemistry to target and eliminate specific performance issues, maximizing diesel power.

Improves Fuel Quality for Peak Performance

• Fuel with a higher cetane number provides for a more complete burn, resulting in improved performance. Diesel Cetane Boost increases cetane up to eight points
• Improves the ignition quality of diesel fuel, maximizing available power and improving starting
• Increases fuel economy, smooths idle and reduces smoke & emissions
• Recommended for use in all types of heavy- and light-duty, on-and off-road and marine diesel engines
• Safe for use in all diesel fuels, including biodiesel

See the Product Data Bulletin for full details.

For off-road and racing use only. Increases octane up to four numbers. Helps reduce engine knock for maximum power, responsiveness and performance.

INCREASES OCTANE UP TO 4 NUMBERS

• Significantly increases engine response and power in two- and four-stroke gasoline-fueled engines.
• Just one treatment reduces engine knock, improves ignition and helps fuel burn cleaner.
• Most users find one 12-ounce (354 mL) bottle for 15 gallons (57 litres) of gasoline provides the ideal performance increase.

EXCELLENT LEAD SUBSTITUTE

• Excellent as a lead substitute in collector automobiles, older off-road equipment and pleasure vehicles.

See the product data sheet for full details.

SEVERE GEAR is designed for those who demand the best. Engineered with high film strength for high-load demands. Reduces friction and provides the ultimate protection against wear. Excels in extreme temperatures. Helps maintain efficiency and outperforms conventional gear oils. Excellent for all cars and trucks, but especially well-suited for towing, hauling, racing, commercial use or other severe duty.

EXCELS IN TEMPERATURE EXTREMES

• Delivers excellent performance in hot and cold temperature extremes.
• Resists breakdown from high heat, preventing acids and carbon/varnish formation.
• Wax-free construction improves cold-flow properties, improving fuel economy and cold-weather shifting.

MAXIMUM WEAR PROTECTION

• Specifically engineered for maximum performance in severe-duty applications.
• Maintains viscosity for long-lasting protection against metal-to-metal contact.
• Proprietary AMSOIL additives form an iron-sulfide barrier coating on gear surfaces, providing the ultimate line of defense against wear, pitting and scoring.
• Helps prevent "thermal runaway," a phenomenon caused by a lubricant’s inability to control friction and increased heat under high-stress conditions.
• Inhibits rapid lubricant degradation and component damage, helping equipment run better and last longer.

*All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.

Engineered for enthusiasts seeking maximum protection and performance. Precision-formulated with cutting-edge technology and a longstanding devotion to making the world’s best motor oil. The result: engine protection that blows the doors off the highest industry standards.

Fights Engine Wear

• 75 percent more engine protection against horsepower loss and wear¹ than required by the industry standard, extending the life of vital components like pistons and cams.
• Develops a strong fluid film that keeps metal surfaces separated.
• Robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life.

¹Based on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.

Signature Series Improves Startup Protection

AMSOIL provides better cold cranking viscosity, helping improve wear protection for engine components at startup.^PP

ASTM D5293 cold Crank (Lower = Better)

^PPBased on independent third-party testing in the industry-standard ASTM D5293 Cold Crank Simulator test as required by SAE J300.
*Trademark names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.

Signature Series Fights Wear

75% more engine protection against horsepower loss and wear.^A

Sequence IVA Engine Test - Lower Number = Less Wear

^ABased on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.

Signature Series Delivers Powerful Protection

AMSOIL delivers powerful protection. How good is it? An independent lab compared AMSOIL synthetic motor oil head-to-head against a leading competitor in a 100,000-mile test.^P AMSOIL provided far superior wear protection and kept bearings looking like new.

^PTesting conducted in an independent lab using AMSOIL Signature Series 5W-30 Synthetic Motor Oil and a leading synthetic-blend 5W-30 motor oil in Ford F-150 trucks with 3.5L twin-turbo engines.

Signature Series Protects Against LSPI

AMSOIL Synthetic Motor Oils achieved 100% protection against LSPI.^B

Example of piston damage due to an LSPI event observed during the testing of a competitor’s motor oil. The red arrows indicate sections of the ring land that have broken away from the piston.

^BBased on zero LSPI events in five consecutive tests of AMSOIL Signature Series, XL and OE 5W-30 Motor Oil in the LSPI engine test required by the GM dexos1 Gen 2 specification.

Signature Series Resists Viscosity Increase

Signature Series is barely challenged by the industry-standard testing, demonstrating only a 0.1% viscosity increase. Even when the test length is doubled, AMSOIL delivered twice the viscosity control required by the standard.^GG

Sequence IIIH Engine Test - Lower number = better viscosity control

^GGBased on independent testing of AMSOIL Signature Series 5W-30 in the Sequence IIIH Engine Test (ASTM D8111), required by the ILSAC GF-6 and API SP specifications.

Signature Series Helps Keep Engines Cleaner

• Fortified with a heavy treatment of detergent additives, delivering 28% more acid-neutralizing power than Mobil 1* and helping engines stay cleaner, longer.^LL
• 50% more detergents^D to help keep oil passages clean and promote oil circulation.
• Controls heat and minimizes performance-robbing deposits.
• Superior thermal durability that resists breakdown and keeps pistons clean.
• Provides 90% better protection against sludge.^DD

The oil pick-up tube screen is virtually free of sludge.

^LLBased upon independent testing of Mobil 1 Annual Protection Full Synthetic 5W-30 and AMSOIL Signature Series 5W-30 in ASTM D2896. Oils purchased July 2020.
^Dvs. AMSOIL OE Motor Oil
^DDBased on independent testing of AMSOIL Signature Series 5W-30 in the ASTM D6593 engine test for oil screen plugging as required by the API SN specification.

Signature Series Guards Turbos

Protects turbochargers 72% better than required^C by the GM dexos1* Gen 2 specification.

^CBased on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.

Keeps Pistons Cleaner

Even after doubling the length of the industry-standard test, AMSOIL delivered 40% cleaner pistons than required by the standard.^FF

^FFBased on independent testing of AMSOIL Signature Series 5W-30 in the Sequence IIIH Engine Test (ASTM D8111), required by the ILSAC GF-6 and API SP specifications.

• Developed to protect the horsepower diesel enthusiasts crave and extend the life of hard-working commercial equipment in the most severe conditions. Signature Series synthetic technology delivers max-duty protection in on- and off-road applications.

  MAXIMUM ENGINE PROTECTION

  • Delivers 6X more wear protection,¹ delivering extra protection so you can push your diesel with peace of mind
  • Provides long-lasting wear protection, keeping cylinder liners looking like new²
  • Delivers up to 60 percent better turbo cleanliness³
  • Withstands the extra demands you place on the turbo when pulling heavy loads or updating the tune for maximum horsepower
  • Provides up to 2X better rust protection⁴

  ¹Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 5W-30 as worst-case representation
  ²Based on independent testing of AMSOIL 5W-30 Signature Series Max-Duty Synthetic Diesel Oil and a leading conventional 15W-40 diesel oil using the Detroit Diesel* DD13 Scuffing test for specification DFS 93K222.
  ³Based on specification standards of CAT C13 2nd Ring Top Land Carbon testing
  ⁴Based on industry standard testing using the NMMA FC-W Rust Test.

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  Delivers More Wear Protection

  Third-party testing shows Signature Series Max-Duty Synthetic Diesel Oil delivers 6X more protection against wear than required by Detroit Diesel’s* standard.^II

  ^IIBased on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 5W-30 as worst-case representation.
  *All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.

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  AMSOIL Fights Wear

  AMSOIL delivers powerful engine protection. How good is it? In third-party testing compared to a leading brand, AMSOIL provided long-lasting wear protection, keeping cylinder liners looking like new.^DD

  ^DDBased on third-party testing of AMSOIL 5W-30 Signature Series Max-Duty Synthetic Diesel Oil and a leading conventional 15W-40 diesel oil using the Detroit Diesel* DD13 Scuffing test for specification DFS 93K222.
  *All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.

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  Keeps Turbos Clean

  AMSOIL Signature Series Max-Duty Synthetic Diesel Oil provides protection boosted to the max, delivering up to 60% better turbo cleanliness^J and withstanding the extra demands you place on the turbo when pulling heavy loads or updating the tune for maximum horsepower.

  ^JBased on specification standards of CAT C13 2nd Ring Top Land Carbon testing

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  Protects Against Rust

  Provides up to 2X better rust protection.^K

  ^KBased on industry standard testing using the NMMA FC-W Rust Test.

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  VISCOSITY CONTROL

  • Resists oxidation and the thickening effects of soot contamination
  • Retains viscosity after high-temperature service for maximum engine protection and efficiency
  • Provides up to 76 percent less oil consumption⁵

  ⁵Than required by the API CK-4 standard in the Caterpillar-1N oil consumption test

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  Reduces Oil Consumption

  Signature Series Max-Duty Synthetic Diesel Oil provides up to 76% less oil consumption.^L

  ^LThan required by the API CK-4 standard in the Caterpillar-1N oil consumption test.

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  EXCELS IN EXTREME TEMPERATURES

  • Provides outstanding protection and performance in hot and cold temperature extremes
  • Resists thermal (heat) breakdown better than conventional and competing synthetic diesel oils.
  • Stays fluid in sub-zero temperatures for easier starting, improved oil flow and reduced wear.

  
  

Engineered for enthusiasts seeking maximum protection and performance. Precision-formulated with cutting-edge technology and a longstanding devotion to making the world’s best motor oil. The result: engine protection that blows the doors off the highest industry standards.

Fights Engine Wear

• 75 percent more engine protection against horsepower loss and wear¹ than required by the industry standard, extending the life of vital components like pistons and cams.
• Develops a strong fluid film that keeps metal surfaces separated.
• Robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life.

¹Based on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.

Signature Series Improves Startup Protection

AMSOIL provides better cold cranking viscosity, helping improve wear protection for engine components at startup.^PP

ASTM D5293 cold Crank (Lower = Better)

^PPBased on independent third-party testing in the industry-standard ASTM D5293 Cold Crank Simulator test as required by SAE J300.
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Signature Series Fights Wear

75% more engine protection against horsepower loss and wear.^A

Sequence IVA Engine Test - Lower Number = Less Wear

^ABased on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.

Signature Series Delivers Powerful Protection

AMSOIL delivers powerful protection. How good is it? An independent lab compared AMSOIL synthetic motor oil head-to-head against a leading competitor in a 100,000-mile test.^P AMSOIL provided far superior wear protection and kept bearings looking like new.

^PTesting conducted in an independent lab using AMSOIL Signature Series 5W-30 Synthetic Motor Oil and a leading synthetic-blend 5W-30 motor oil in Ford F-150 trucks with 3.5L twin-turbo engines.

Signature Series Protects Against LSPI

AMSOIL Synthetic Motor Oils achieved 100% protection against LSPI.^B

Example of piston damage due to an LSPI event observed during the testing of a competitor’s motor oil. The red arrows indicate sections of the ring land that have broken away from the piston.

^BBased on zero LSPI events in five consecutive tests of AMSOIL Signature Series, XL and OE 5W-30 Motor Oil in the LSPI engine test required by the GM dexos1 Gen 2 specification.

Signature Series Resists Viscosity Increase

Signature Series is barely challenged by the industry-standard testing, demonstrating only a 0.1% viscosity increase. Even when the test length is doubled, AMSOIL delivered twice the viscosity control required by the standard.^GG

Sequence IIIH Engine Test - Lower number = better viscosity control

^GGBased on independent testing of AMSOIL Signature Series 5W-30 in the Sequence IIIH Engine Test (ASTM D8111), required by the ILSAC GF-6 and API SP specifications.

Signature Series Helps Keep Engines Cleaner

• Fortified with a heavy treatment of detergent additives, delivering 28% more acid-neutralizing power than Mobil 1* and helping engines stay cleaner, longer.^LL
• 50% more detergents^D to help keep oil passages clean and promote oil circulation.
• Controls heat and minimizes performance-robbing deposits.
• Superior thermal durability that resists breakdown and keeps pistons clean.
• Provides 90% better protection against sludge.^DD

The oil pick-up tube screen is virtually free of sludge.

^LLBased upon independent testing of Mobil 1 Annual Protection Full Synthetic 5W-30 and AMSOIL Signature Series 5W-30 in ASTM D2896. Oils purchased July 2020.
^Dvs. AMSOIL OE Motor Oil
^DDBased on independent testing of AMSOIL Signature Series 5W-30 in the ASTM D6593 engine test for oil screen plugging as required by the API SN specification.

Signature Series Guards Turbos

Protects turbochargers 72% better than required^C by the GM dexos1* Gen 2 specification.

^CBased on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.

Keeps Pistons Cleaner

Even after doubling the length of the industry-standard test, AMSOIL delivered 40% cleaner pistons than required by the standard.^FF

^FFBased on independent testing of AMSOIL Signature Series 5W-30 in the Sequence IIIH Engine Test (ASTM D8111), required by the ILSAC GF-6 and API SP specifications.

Premium synthetic formulation designed for the unique demands of European engines. Protects advanced emissions systems. Excellent for both gasoline and diesel engines. Fights sludge for superior engine cleanliness. Outstanding all-season performance. Designed for the extended drain intervals established by European car manufacturers. Excellent for turbochargers.

ADVANCED ENGINE PROTECTION

• Delivers 100% synthetic engine protection for advanced automotive technology.
• Thermally stable oil formulation resists deposit formation and cools turbochargers.
• Formulated for long drain intervals recommended by European automakers.

Complete Coverage

• Meets and often exceeds strict European manufacturer specifications.
• Shear-stable synthetic base oils and high-quality anti-wear additives.
• Outstanding protection in high-temperature conditions.
• Dependable performance throughout long drain intervals.

Emissions System Protection

• Precisely balanced formulations designed for use with modern exhaust treatment devices.
• Protects sensitive emissions systems with optimal blend of SAPS (sulfated ash, phosphorus, sulfur).
• Carefully crafted in eight varieties to ensure proper emissions system function.

Excellent for Turbochargers

• Robust composition shields engines from high temperatures produced by turbochargers.
• Thermally stable oil formulation resists deposit formation and cools turbochargers.
• Low pour point protects turbochargers against oil starvation in subzero temperatures.