Synthetic Oil Inc

Briggs & Stratton Synthetic 4T Racing Oil

Specially Formulated for European Gasoline and Diesel Engines

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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.

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Briggs & Stratton Synthetic 4T Racing Oil is the brainchild of a joint effort between Briggs & Stratton* engineers and AMSOIL INC. Briggs & Stratton came to us with a request: develop a motor oil capable of maximizing horsepower while handling the intense heat and shearing forces inside its competition four-stroke engines. Synthetic 4T Racing Oil is the result. It's specially engineered for competition engines without the shortcomings of automotive, PAG or conventional "karting" oils. It's perfect for racers who want to get the most horsepower and longest life from their engines used in kart, junior drag, quarter midget and other racing applications.
Formulated to Reduce Heat
Synthetic 4T Racing Oil is formulated with pure synthetic base oils that resist extreme heat common to air-cooled racing engines better than conventional oils. Its increased thermal stability helps reduce operating temperatures and guards against sludge and deposits that rob engines of power, promoting optimum engine performance and life.
Maximum Horsepower
Synthetic 4T Racing Oil combines the horsepower of a lite oil with the wear protection of a heavier oil. It is engineerd with specialized friction modifiers and advanced additives that reduce energy loss due to friction. Using Synthetic 4T Racing Oil helps racers put more power to the ground.
Fights Engine Wear
Synthetic 4T Racing Oil is engineered with powerful anti-foam agents. It resists foam common to high-rpm operation to form a durable lubricating film between engine parts, keeping engines protected in the most extreme conditions.
Resist Corrosion
- 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
Use Briggs & Stratton Synthetic 4T Racing Oil in 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.
Introduced in March 2012, Briggs & Stratton Synthetic 4T Racing Oil (GBS2960), formulated by AMSOIL, is available exclusively through AMSOIL and its Dealer network.

Briggs & Stratton is the world’s largest small-engine manufacturer, and karting is the fastest-growing motorsport in the U.S. Tens of thousands of racers rely on Briggs & Stratton engines at the track every weekend. While using competing oils in the extreme operating conditions of its racing motors, Briggs & Stratton experienced myriad failures and issues, including accelerated wear, foul odor, oil vaporization and very short change intervals. Looking to resolve the problems, Briggs & Stratton chose AMSOIL to formulate Synthetic 4T Racing Oil. AMSOIL entered the partnership enthusiastically, formulating an oil that provides outstanding protection and performance in extreme operating conditions. Providing an oil exclusively for Briggs & Stratton’s highest-performing racing engines strengthens the AMSOIL reputation for quality and increases brand recognition.

Premium Oil for Severe Racing Applications
Synthetic 4T Racing Oil is formulated specifically to handle the severity of Briggs & Stratton modified competition engines used in kart, junior drag, quarter midget and other racing applications and is recommended for any four-stroke air-cooled competition engine, whether single- or multi-cylinder, splash- or pressure-lubricated.

Combining the protection qualities of a heavy oil with the performance benefits of a light oil, Synthetic 4T Racing Oil helps racers elicit the most horsepower and longest life from their engines. It provides outstanding protection in both stock karts and limited-mod kart applications running over 10,000 rpm, with no sacrifice in horsepower. Racers using competing oils need both a light and a medium oil to achieve a similar combination of protection and horsepower. Synthetic 4T Racing Oil was dyno-tested using the Briggs & Stratton Animal engine, and proven to provide outstanding performance in the most-extreme conditions possible. It effectively resists the elevated heat common to high performance racing engines, and it protects against the formation of corrosion between races and during longer storage periods.

“We are really excited about this relationship with AMSOIL,” said Director of Briggs & Stratton Racing David Klaus. “After a year in development and our first race season under our belt, racers are seeing the benefits of an oil engineered specifically for the environment in which it operates.”