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Synthetic Racing Motor Oil

Dominator® 5W-20 Racing Motor Oil (RD20)

Product Code: RD20QT-EA

AMSOIL Dominator® Synthetic 5W-20 Racing Motor Oil (RD20) provides superior performance and maximum protection in high-performance and racing applications. Formulated to withstand the elevated RPM, high temperatures and shock-loading common to racing applications, Dominator Synthetic 5W-20 Racing Oil delivers superior performance and maximum protection in extreme conditions.

Package sizes include:
1-Quart Bottle
1-Quart Bottles (case of 12)
55-Gallon Drum

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PRODUCT DESCRIPTION
AMSOIL Dominator® Synthetic 5W-20 Racing Motor Oil (RD20) shear-stable formulation was engineered to provide maximum horsepower without sacrificing engine protection. Dominator Synthetic 5W-20 Racing Motor Oil provides straight-grade protection in a multi-grade formulation. AMSOIL, the leader in automotive synthetic lubrication, produced the world’s first API-qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL The First in Synthetics® to do the best job protecting your engine.
MAXIMUM DURABILITY, MAXIMUM WEAR PROTECTION
AMSOIL Dominator Synthetic Racing Oil features an additive package heavily fortified with zinc and phosphorus for superior long-term wear protection. Designed for maximum durability, it ensures critical engine components are protected for the duration of the race. Dominator Synthetic 5W-20 Racing Motor Oil’s superior additive technology provides unmatched durability in extreme conditions. In addition, its light viscosity makes it ideal for high-performance tuner cars and sub-compact vehicles.
SUPERIOR PERFORMANCE
Dominator Synthetic Racing Motor Oil’s proprietary friction modifier provides reduced friction for maximum power and cooler engine temperatures, resulting in improved lap times and longer-lasting equipment.
PROTECTION FROM STARTUP TO THE CHECKERED FLAG
Dominator Synthetic 5W-20 Racing Motor Oil’s multi-viscosity design provides maximum protection in temperature extremes. Dominator Racing Motor Oil offers excellent coldstart protection and provides less drag when engine oil has not reached stable operating temperatures. It maintains superior film strength during high-temperature operation on the track.
SUPERIOR-QUALITY OILS, NO DISCRIMINATION
Many oil companies produce specialty racing oils for elite groups and do not offer them to the general public. For instance, several popular oil manufacturers produce racing oils offered only to NASCAR racers. All AMSOIL synthetic motor oils are already formulated to a higher level of performance than competitors’ oils, and AMSOIL Dominator Synthetic Racing Motor Oil is no exception. It provides maximum performance and superior protection to all racers, regardless of their level of competition. The same AMSOIL Dominator Synthetic Racing Motor Oil that is used in the engines of AMSOIL corporately-sponsored racers, including Scott Douglas and Brady Smith, are available to everyone.
APPLICATIONS
AMSOIL Dominator Synthetic 5W-20 Racing Motor Oil is recommended for high-rpm, high-horsepower, turbo/supercharged, gasoline- or alcohol-burning and nitrous oxide gas-injected applications operated under severe conditions.

Applications include, but are not limited to, the following:
• Modified Small Block • Asphalt Late Model • GM Crate Late Model • NHRA Stock Eliminator • Bracket • Midget • Kart • Junior Dragster • Other domestic and import high-performance racing and street applications requiring 20-weight oil. The low-viscosity formulation and robust additive package of Dominator 5W-20 make it ideal for use as a high-strength qualifying oil.

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Dominator® 10W-30 Racing Oil

Product Code: RD30QT-EA

AMSOIL Dominator® Synthetic 10W-30 Racing Oil (RD30) provides superior performance and maximum protection in high-performance and racing applications. Formulated to withstand the elevated RPM, high temperatures and shock-loading common to racing applications, Dominator Synthetic 10W-30 Racing Oil delivers superior performance and maximum protection in extreme conditions.

Package sizes include:
1-Quart Bottle
1-Quart Bottles (case of 12)
55-Gallon Drum

Place Order

PRODUCT DESCRIPTION
AMSOIL Dominator® Synthetic 10W-30 Racing Oil (RD30) provides superior performance and maximum protection in high-performance and racing applications. Formulated to withstand the elevated RPM, high temperatures and shock-loading common to racing applications, Dominator Synthetic 10W-30 Racing Oil delivers superior performance and maximum protection in extreme conditions. Its shear-stable formulation was engineered to provide maximum horsepower without sacrificing engine protection. Dominator Synthetic 10W-30 Racing Oil provides straight-grade protection in a multi-grade formulation.

AMSOIL, the leader in automotive synthetic lubrication, produced the world’s first API-qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL The First in Synthetics® to do the best job protecting your engine.

MAXIMUM DURABILITY, MAXIMUM WEAR PROTECTION
AMSOIL Dominator Synthetic Racing Oil features an additive package heavily fortified with zinc and phosphorus for superior long-term wear protection. Designed for maximum durability, it ensures critical engine components are protected for the duration of the race. Dominator Synthetic Racing Oil’s superior additive technology provides unmatched durability in extreme conditions. In addition, its high levels of zinc and phosphorus additives make it ideal for street rods, muscle cars and other vehicles with flat-tappet cams.
SUPERIOR PERFORMANCE
Dominator Synthetic Racing Oil’s proprietary friction modifier provides reduced friction for maximum power and cooler engine temperatures, resulting in improved lap times and longer-lasting equipment.
PROTECTION FROM STARTUP TO THE CHECKERED FLAG
Dominator Synthetic 5W-20 Racing Oil’s multi-viscosity design provides maximum protection in temperature extremes. Dominator Racing Oil offers excellent coldstart protection and provides less drag when engine oil has not reached stable operating temperatures. It maintains superior film strength during high-temperature operation on the track.
SUPERIOR-QUALITY OILS, NO DISCRIMINATION
Many oil companies produce specialty racing oils for elite groups and do not offer them to the general public. For instance, several popular oil manufacturers produce racing oils offered only to NASCAR racers. All AMSOIL synthetic motor oils are already formulated to a higher level of performance than competitors’ oils, and AMSOIL Dominator Synthetic Racing Oil is no exception. It provides maximum performance and superior protection to all racers, regardless of their level of competition. The same AMSOIL Dominator Synthetic Racing Oil that is used in the engines of AMSOIL corporately-sponsored racers, including Scott Douglas and Brady Smith, are available to everyone.
APPLICATIONS
AMSOIL Dominator Synthetic 10W-30 Racing Oil is recommended for high-rpm, high-horsepower, turbo/supercharged, gasoline- or alcohol-burning and nitrous oxide gas-injected applications operated under severe conditions.

Applications include, but are not limited to, the following:
• Asphalt Late Model • Dirt Late Model • Modified Big Block • Modified Small Block • GM Crate Late Model • Marine • Sprint • Midget • Kart • Other domestic and import high-performance racing and street applications requiring 30-weight oil.

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Dominator® 15W-50 Racing Oil

Product Code: RD50QT-EA

AMSOIL Dominator® Synthetic 15W-50 Racing Oil (RD50) provides superior performance and maximum protection in high-performance and racing applications. Formulated to withstand the elevated RPM, high temperatures and shock-loading common to racing applications, Dominator Synthetic 15W-50 Racing Oil delivers superior performance and maximum protection in extreme conditions.

Package sizes include:
1-Quart Bottle
1-Quart Bottles (case of 12)
1-Gallon Bottle
1-Gallon Bottles (case of 4)
55-Gallon Drum

Place Order

PRODUCT DESCRIPTION
AMSOIL Dominator® Synthetic 15W-50 Racing Oil (RD50) provides superior performance and maximum protection in high-performance and racing applications. Formulated to withstand the elevated RPM, high temperatures and shock-loading common to racing applications, Dominator Synthetic 15W-50 Racing Oil delivers superior performance and maximum protection in extreme conditions. Its shear-stable formulation was engineered to provide maximum horsepower without sacrificing engine protection. Dominator Synthetic 15W-50 Racing Oil provides straight-grade protection in a multi-grade formulation.

AMSOIL, the leader in automotive synthetic lubrication, produced the world’s first API-qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL The First in Synthetics® to do the best job protecting your engine.

MAXIMUM DURABILITY, MAXIMUM WEAR PROTECTION
AMSOIL Dominator Synthetic Racing Oil features an additive package heavily fortified with zinc and phosphorus for superior long-term wear protection. Designed for maximum durability, it ensures critical engine components are protected for the duration of the race. Dominator Synthetic Racing Oil’s superior additive technology provides unmatched durability in extreme conditions. In addition, its high levels of zinc and phosphorus additives make it ideal for street rods, muscle cars and other vehicles with flat-tappet cams.
SUPERIOR PERFORMANCE
Dominator Synthetic Racing Oil’s proprietary friction modifier provides reduced friction for maximum power and cooler engine temperatures, resulting in improved lap times and longer-lasting equipment.
PROTECTION FROM STARTUP TO THE CHECKERED FLAG
Dominator Synthetic 15W-50 Racing Oil’s multi-viscosity design provides maximum protection in temperature extremes. Dominator Racing Oil offers excellent coldstart protection and provides less drag when engine oil has not reached stable operating temperatures. It maintains superior film strength during high-temperature operation on the track.
SUPERIOR-QUALITY OILS, NO DISCRIMINATION
Many oil companies produce specialty racing oils for elite groups and do not offer them to the general public. For instance, several popular oil manufacturers produce racing oils offered only to NASCAR racers. All AMSOIL synthetic motor oils are already formulated to a higher level of performance than competitors’ oils, and AMSOIL Dominator Synthetic Racing Oil is no exception. It provides maximum performance and superior protection to all racers, regardless of their level of competition. The same AMSOIL Dominator Synthetic Racing Oil that is used in the engines of AMSOIL corporately-sponsored racers, including Scott Douglas and Brady Smith, are available to everyone.
APPLICATIONS
AMSOIL Dominator Synthetic 15W-50 Racing Oil is recommended for high-rpm, high-horsepower, turbo/supercharged, gasoline- or alcohol-burning, nitro-fueled or nitrous oxide gas-injected applications operated under severe conditions.

Applications include, but are not limited to, the following:
• Asphalt Late Model • Dirt Late Model • Modified Big Block • Ford Crate Late Model • Dodge Crate Late Model • Endurance • Rally • Sprint • Truck-Pull • Aluminum Block • Marine • Other high-performance racing and street applications requiring 50-weight oil.

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DOMINATOR® SAE 60 Racing Oil

Product Code: RD60QT-EA

AMSOIL DOMINATOR® SAE 60 Racing Oil provides superior performance and maximum protection in high-performance and racing applications. DOMINATOR is engineered from advanced synthetic technology to better withstand the elevated rpm, high temperatures and shock-loading common to racing applications.

Package sizes include:
1-Quart Bottle

Place Order

PRODUCT DESCRIPTION
AMSOIL DOMINATOR® Synthetic SAE 60 Racing Oil (RD60) provides superior performance and maximum protection in high-performance and racing applications. DOMINATOR is engineered from advanced synthetic technology to better withstand the elevated rpm, high temperatures and shock-loading common to racing applications. Its robust formulation, tested and validated by championship race teams, is designed to provide maximum horsepower without sacrificing engine protection. DOMINATOR provides straight-grade protection in a multi-grade formulation.

AMSOIL, the leader in automotive synthetic lubrication, produced the world’s first API-qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL The First in Synthetics® to do the best job protecting your engine.

ANTI-WEAR FORMULATION
Racing and high-performance engines are typically modified to deliver maximum horsepower and speed. Their powerful designs create shearing forces that can cause lesser oils to lose viscosity, leaving bearings, pistons and other components vulnerable to wear and failure. DOMINATOR Synthetic Racing Oil’s durable formulation resists viscosity loss due to mechanical shear to maintain a strong protective oil film. It is heavily fortified with zinc and phosphorus anti-wear additives to provide additional protection against scuffing and wear in severe racing conditions.
MAXIMUM HORSEPOWER
The excessive friction and heat of racing robs engines of power and longevity. DOMINATOR is formulated with a proprietary friction modifier for maximum horsepower and cooler engine temperatures, promoting improved lap times and longer-lasting components.

  • Formulated Specifically for Racing & High-Performance Engines
  • Robust Formulation Resists Viscosity Loss
  • Proprietary Friction Modifier Maximizes Horsepower & Torque
  • Fortified with Anti-Wear Additives for Extra Protection
RACING IS RESEARCH™
The AMSOIL Offshore Racing Team has claimed many national and world championship titles in several different categories of racing, and AMSOIL DOMINATOR Synthetic Racing Oil has been key to its success. After a full racing season covering 3,000 miles of extreme driving, a teardown of one of the team’s Mercury® 525 EFI V-8 engines revealed clean, virtually wear-free components.
PROTECTION FROM STARTUP TO THE CHECKERED FLAG
DOMINATOR provides maximum protection in temperature extremes. Its low pour point offers excellent cold-start protection and provides less drag when the oil has not reached stable operating temperatures. At elevated operating temperatures, it maintains superior film strength. DOMINATOR’s thermally stable synthetic chemistry resists the effects of intense heat common to racing engines to provide reliable protection for the duration of the race.
COMMERCIAL AVAILABILITY
Many oil companies produce specialty racing oils for elite groups and do not offer them to the general public. For example, several popular oil manufacturers produce racing oils offered only to NASCAR racers. All AMSOIL synthetic motor oils are already formulated to a higher level of performance than competitors’ oils, and AMSOIL DOMINATOR Synthetic Racing Oil is no exception. It provides maximum performance and superior protection to all racers, regardless of their level of competition. The same AMSOIL DOMINATOR Synthetic Racing Oil that is used in the engines of AMSOIL corporately sponsored racers, including Scott Douglas, Bob Teague and Erik Buell Racing are available to everyone.
APPLICATIONS
DOMINATOR Synthetic Racing Oil is excellent for use in racing and high-performance engines. Check the owner’s manual or engine builder’s recommendations for the correct viscosity.

AMSOIL Ea® Racing Air Filters (EAAR) are specially designed for racing and street rod enthusiasts who desire AMSOIL Ea protection in carbureted applications. AMSOIL Ea Racing Air Filters are constructed with the same synthetic nanofiber media as other AMSOIL Ea Air Filters, providing maximum protection and extended filter life.

AMSOIL offers WIX Racing Oil Filters for racing applications. WIX racing filters are specially designed for racing applications only.

Typical Technical Properties

DOMINATOR® Synthetic SAE 60 Racing Oil (RD60)Results
Kinematic Viscosity @ 100°C, cSt (ASTM D 445)24.5
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)175.7
Viscosity Index (ASTM D-2270)NR*
CCS Viscosity (°C), cP (ASTM D 5293)6787 (-20)
Pour Point °C (°F) (ASTM D 97)-36 (-33)
Flash Point °C (°F) (ASTM D 92)236 (456)
Fire Point °C (°F) (ASTM D 92)256 (492)
Four Ball Wear Test (ASTM D 4172B: 40 kgf, 150°C, 1800 rpm, 1 hr), Scar, mm0.39
Noack Volatility, % weight loss (g/100g) (ASTM D 5800)8.0
High Temperature/High Shear Viscosity @ 150°C, 1.0 X 106 s.-1), cP (ASTM D 5481)7.1
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Briggs & Stratton Synthetic 4T Racing Oil

Product Code: GBS2960-EA

Briggs & Stratton Synthetic 4T Racing Oil is proven in the lab and on the track to provide increased performance in kart, junior drag, quarter midget and other racing applications. It offers benefits other oils simply can’t match.

Package sizes include:
1-Quart Bottle

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PRODUCT DESCRIPTION
Stock and modified small-displacement racing engines are subjected to extreme heat and elevated rpm that literally tear apart inferior oils. Viscosity loss and oil foaming can result, inviting wear and catastrophic engine failure. AMSOIL combined its extensive experience formulating high-performance synthetic lubricants with the engine-building expertise of Briggs & Stratton® to develop an oil specifically designed to help racers elicit the most horsepower and longest life from their engines. Synthetic 4T Racing Oil is proven in the lab and on the track to provide increased performance in kart, junior drag, quarter midget and other racing applications. It offers benefits other oils simply can’t match.
FORMULATED TO REDUCE HEAT
Synthetic 4T Racing Oil does not contain impurities inherent to conventional oils, allowing it to naturally resist the elevated heat common to high-performance racing engines, including air-cooled models. Its increased thermal stability helps reduce operating temperatures and guards against the formation of harmful sludge and deposits, promoting optimum engine performance and life.
MAXIMUM HORSEPOWER & PROTECTION
Synthetic 4T Racing Oil is engineered with specialized friction modifiers and advanced additives that reduce energy loss due to friction while providing strong anti-wear properties. As a result, Synthetic 4T Racing Oil combines the horsepower of a lite oil with the wear protection of a heavier oil.
CONTAINS POWERFUL FOAM INHIBITORS
The churning action inside high-rpm engines introduces air into the oil, which causes lesser oils to foam. As air bubbles are drawn between engine parts, they collapse, allowing metal-to-metal contact and wear. Synthetic 4T Racing Oil is engineered with powerful anti-foam agents. It resists foam to form a durable lubricating film between engine parts.
RESISTS CORROSION
Synthetic 4T Racing Oil contains corrosion inhibitors to guard against the formation of corrosion between races and during longer periods of storage.

  • Tested and Validated by Briggs & Stratton and AMSOIL
  • Combines the Protection of a Heavier Oil with the Performance of a Lite Oil
  • Reduces Harmful Heat
  • Inhibits Foam
  • Resists Corrosion
APPLICATIONS
Briggs & Stratton Synthetic 4T Racing Oil is formulated specifically for stock and modified small-displacement air-cooled racing engines used in kart, junior drag, quarter midget and other racing applications. It is recommended for any four-stroke air-cooled competition engine, whether single- or multi-cylinder, splash- or pressure-lubricated, including Briggs & Stratton V-Twin engines requiring the listed viscosity and lubricating properties. Synthetic 4T Racing Oil is recommended for alcohol- and gasoline-fueled engines. Compatible with mineral oils.
RECOMMENDATIONS
Do not mix with polyalkylene glycol (PAG) oils when converting to Synthetic 4T Racing Oil. Drain existing oil and refill with Synthetic 4T Racing Oil. Then operate engine at idle/low speed for 2-3 minutes. Drain oil and refill with fresh Synthetic 4T Racing Oil.
SERVICE LIFE
Follow the original equipment manufacturer (OEM) or engine builder’s recommendations.

Typical Technical Properties

Briggs & Stratton Synthetic 4T Racing Oil (GBS2960)Results
Kinematic Viscosity @ 100°C, cSt (ASTM D 445)11.6
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)72.2
Viscosity Index (ASTM D-2270)156
CCS Viscosity (°C), cP (ASTM D 5293)6787 (-20)
Pour Point °C (°F) (ASTM D 97)-46 (-51)
Flash Point °C (°F) (ASTM D 92)226 (439)
Fire Point °C (°F) (ASTM D 92)244 (471)
Four-Ball Wear Test @ 40 kgf, 75ºC, 1200 rpm, 1 hr, scar diameter, mm (ASTM D 4172)0.36
NOACK Volatility, % weight loss (g/100g) (ASTM D 5800)9.7
High Temperature/High Shear Viscosity @ 150°C, 1.0 X 106 s.-1), cP (ASTM D 5481)4.2
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DOMINATOR® Synthetic 2-Stroke Racing Oil (TDR)

Product Code: TDRQT-EA

Racing 2-cycle oil with an emphasis toward high-horsepower and modified racing or trail motors. Contains higher viscosity base oils for best overall protection and additives for higher operating temperatures. Injector use or 50:1 pre-mix. For snowmobiles, motorcycles, ATVs, PWC, go-carts and racing outboard motors.

Package sizes include:
• 1-Quart Bottle
• 1-Quart Bottles (case of 12)
• 1-Gallon Bottle
• 1-Gallon Bottles (case of 4)
• 16-Gallon Keg
• 30-Gallon Drum
• 55-Gallon Drum

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PRODUCT DESCRIPTION
Racers can’t win what they don’t finish. That’s why AMSOIL formulators built DOMINATOR® 2-Stroke Racing Oil. This complex blend of oils and additives directly addresses the heat, pressure and friction of race-engineered engines. These engines operate on the edge, yet engine reliability is critical. DOMINATOR does an outstanding job protecting high-performance engines. It adds durability that professional racing teams depend on and delivers confidence so engines can be pushed to the limit.

  • Excellent film strength for high heat, high-rpm motors
  • Anti-friction formula for maximum power
  • Burns clean; helps prevent ring sticking and plug fouling
  • Protects coated and non-coated racing pistons
Excellent Lubricity and Film Strength
High-performance and race-designed two-stroke engines operate under severe conditions. They are modified for higher compression ratios, higher rpm and leaner combustion, all of which increase heat and pressure. High heat can quickly burn off light oils and cause rapid piston expansion, decreasing piston-to-cylinder wall clearances and increasing the likelihood of piston scuffing and seizure. High pressure can exceed the film strength of low-viscosity oils, which promotes crankshaft bearing wear and pitting.

DOMINATOR is purpose-built for outstanding film strength and lubricity. It is engineered with carefully selected, higher-viscosity synthetic base oils to withstand the high heat and pressure common to high-performance and racing applications. DOMINATOR’s anti-friction chemistry is race-proven to provide an extra measure of protection against piston scuffing and bearing wear.

Outstanding Cleanliness
The oil and fuel burned in the two-stroke combustion process leave destructive deposits on the pistons, rings and in the combustion chamber. Excessive deposits can lead to catastrophic engine problems, including ring sticking, exhaust port blocking and pre-ignition.

AMSOIL DOMINATOR is formulated with clean-burning synthetic base oils and powerful high-temperature detergent additives for exceptional deposit control. It helps prevent the power-robbing carbon deposits that cause ring sticking, exhaust port blocking and pre-ignition. AMSOIL DOMINATOR is optimized for severe service.

RACING IS RESEARCH™
AMSOIL disassembled the Rotax motor from Scheuring Speed Sports’ Ski-Doo race snowmobile ridden by Robbie Malinoski during the 2010/2011 professional snocross tour. Both pistons revealed minimal wear and were suitable for continued use. AMSOIL DOMINATOR delivered outstanding protection for Malinoski’s Ski-Doo in the most severe environment.
APPLICATIONS
DOMINATOR is recommended for use in high performance stock or modified two-stroke motors, including air- or liquid-cooled snowmobiles, personal watercraft, motorcycles (moto X), ATVs, go-carts and outboard motors*. Good for use with coated or non-coated pistons, high-octane racing fuels and exhaust power valves. Compatible with most other two-stroke oils; however, mixing oils should be minimized.

Use in oil-injected and pre-mix applications where API TC oils are specified. In pre-mix applications, DOMINATOR delivers outstanding protection at 50:1 pre-mix ratios (2.6 oz. oil per U.S. gallon of gas), although many racers modify the mix ratio to suit their setup. Not suitable for use with alcohol or nitro-methane fuels.

Not suitable for long-term use in outboard motors as a TC-W3 type oil, although excellent as a race oil for short-term use where motors are periodically inspected.

Typical Technical Properties

DOMINATOR™ Synthetic 2-Stroke Racing OilResults
Kinematic Viscosity @ 100°C, cSt (ASTM D-445)7.5
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)41.4
Viscosity Index (ASTM D-2270)151
Pour Point °C (°F) (ASTM D-97)-51 (-60)
Flash Point °C (°F) (ASTM D-92)90 (194)
Fire Point °C (°F) (ASTM D-92)90 (194)
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Break-In Oil (SAE 30)

Product Code: BRKQT-EA

Formulated without friction modifiers to allow for quick and efficient piston ring seating in new and rebuilt high-performance and racing engines. Contains zinc and phosphorus anti-wear additives to protect cam lobes, lifters and rockers during the critical break-in period when wear rates are highest.

Package sizes include:
1-Quart Bottle
1-Quart Bottles (case of 12)

Place Order

PRODUCT DESCRIPTION
AMSOIL Break-In Oil is an SAE 30 viscosity grade oil formulated without friction modifiers to allow for quick and efficient piston ring seating in new and rebuilt high-performance and racing engines. It contains zinc and phosphorus anti-wear additives to protect cam lobes, lifters and rockers during the critical break-in period when wear rates are highest, while its increased film strength protects rod and main bearings from damage. AMSOIL Break-In Oil is designed to increase compression, horsepower and torque for maximum engine performance.
QUICKLY SEAT RINGS
The primary goal during engine break-in is to seat the rings against the cylinder wall. Properly seated rings increase compression, resulting in maximum horsepower; they reduce oil consumption and prevent hot combustion gases from entering the crankcase. To achieve this, however, the oil must allow the correct level of “controlled wear” to occur between the cylinder wall/ring interface while maintaining wear protection on other critical engine parts. Insufficient break-in leaves behind peaks on the cylinder wall that prevent the rings from seating. The deeper valleys, meanwhile, allow excess oil to collect and burn during combustion, increasing oil consumption. Too much wear results in cylinder glazing due to peaks “rolling over” into the valleys and preventing oil from collecting and adequately lubricating the cylinder wall.
PROTECTS CRITICAL PARTS FROM WEAR
New flat-tappet camshafts and lifters are not seasoned or broken in and must be heat-cycled to achieve proper hardness. During the break-in period, these components are susceptible to accelerated wear because they are splash-lubricated, unlike other areas of the engine that are pressure lubricated. AMSOIL Break-In Oil contains high levels of zinc and phosphorus (ZDDP) additives designed to provide the anti-wear protection required during this critical period.
INCREASED FILM STRENGTH
High-performance and racing engines often use aftermarket parts designed to increase torque and horsepower. The added stress can rupture the oil film responsible for preventing harmful metal-to-metal contact on rod and main bearings. The base oils in AMSOIL Break-In Oil provide increased film strength to protect bearings from wear.
APPLICATIONS
AMSOIL Break-In Oil is designed to effectively break in high-performance and racing engines requiring SAE 30 oil, helping maximize compression, horsepower and torque.
RECOMMENDATIONS
The engine builder’s or manufacturer’s break-in recommendations should be followed if available. Break-in period should not exceed 1,000 miles. When the engine is new, the exhaust ports will have a large area of oil residue. As the rings begin to seat, less oil is passed and the oil residue area begins to shrink. When the rings are fully seated and have formed a tight seal against the cylinder walls, no oil residue will be evident. Other common methods to determine if rings have seated include performing a leak-down test or horsepower measurements over time. Break-in duration will vary between engines. Afterwards, drain and fill the engine with an AMSOIL high-performance synthetic oil that meets builder or manufacturer specifications.
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Engine Assembly Lube

Product Code: EALTB-EA

AMSOIL Engine Assembly Lube (EAL) is formulated to cling to engine parts and provide exceptional wear protection, while inhibiting rust and corrosion in newly built or rebuilt four-stroke engines. It is designed to dissolve in oil, helping eliminate oil port clogging and deposit formation.

Package sizes include:
4-Fl. OZ. Tube
4-Fl. OZ. Tubes (Case of 12)

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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
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