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