AMSOIL Formula 4-Stroke® 10W-40 Synthetic Scooter
Unsurpassed Protection for Scooter
Engines, Transmissions and Gear Boxes
AMSOIL Formula 4-Stroke® 10W-40
Synthetic Scooter Oil (ASO) is formulated specifically
to meet the special needs of todays high-tech
air- and water-cooled fourstroke motorized scooters,
offering unsurpassed wear protection and friction
reduction for longer equipment life and cooler operating
temperatures. Its exceptional shear stability ensures
consistent viscosity protection and provides additional
protection for transmissions and gear boxes, while
its friction modifier-free formulation ensures wet
clutch compatibility and smooth clutch operation.
A special anti-corrosion additive package provides
long-term protection during periods of inactivity
High engine rpms common to scooter
applications increase shear, causing conventional
lubricants to lose viscosity and reduce their ability
to control wear, resulting in shorter engine life.
The synthetic formulation of Formula 4-Stroke Synthetic
Scooter Oil effectively resists shear, delivering
consistent viscosity protection for unsurpassed wear
protection and extended equipment life.
The operating temperatures of scooter
engines fluctuate greatly, especially with air-cooled
engines. Formula 4-Stroke Synthetic Scooter Oil resists
breakdown at elevated temperatures, maintaining its
protective viscosity for maximum wear control.
Transmission and Gear Box Compatibility
In many scooter applications, the
engine and transmission and/or gear box share the
same oil reservoir. Formula 4-Stroke Synthetic Scooter
Oil is absolutely shear stable and will not thin out
from mechanical activity, providing superior protection
for transmissions and gear boxes.
Wet Clutch Compatibility
Some scooters utilize a frictional
clutch to engage and disengage the engine from the
drivetrain. In many cases, this clutch is immersed
in the same oil used in the engine and transmission.
Formula 4-Stroke Synthetic Scooter Oil contains no
friction modifiers and is wet clutch compatible, offering
smooth clutch operation and increased clutch life.
Rust and Corrosion Protection
Scooters are often subjected to extended
periods of inactivity and storage, exposing the equipment
to internal rust and corrosion. Formula 4-Stroke Synthetic
Scooter Oil is formulated with a special anti-corrosion
additive package designed to provide long-term protection
during periods of inactivity and storage.
Applications and Recommendations
AMSOIL Formula 4-Stroke Synthetic
Scooter Oil is recommended for use wherever SAE 10W-40
motor oil is specified in air- and watercooled four-stroke
motorized scooter engines, transmissions and gear
boxes that require the following:
- API SG, SL/CF
- JASO MA/MA2 (motorcycle wet
Engine manufacturers include, but
are not limited to, Honda, Kawasaki, Suzuki, Yamaha,
Vespa, Aprilia, Piaggio, Benelli, Vento, Kymco, Tank
Follow the equipment manufacturers
recommended drain intervals.
4-Stroke® 10W-40 Synthetic Scooter Oil (ASO)
@ 100°C, cSt (ASTM D-445)
@ 40°C, cSt (ASTM D-445)
Pour Point °C (°F)
Flash Point °C
(°F) (ASTM D-92)
Fire Point °C (°F)
Four Ball Wear
(ASTM D-4172B: 40 kgf, 75°C, 1200 rpm, 1 hr),
% weight loss (g/100g) (ASTM D-5800)
(ASTM D 4683 @ 150°C, 1.0 X 106 s.-1),
Total Base Number
AMSOIL Formula 4-Stroke Synthetic
Scooter Oil is compatible with conventional and synthetic
motor oils. Mixing AMSOIL motor oils with other oils,
however, will shorten the oil life expectancy and
reduce the performance benefits. Aftermarket oil additives
are not recommended for use with AMSOIL motor oils.
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).