4-Stroke Outboard Motor Warranty Certified
Formula 4-Stroke® Marine Synthetic Motor Oil is certified by the National Marine
Manufacturers Association (NMMA) for use in four-stroke outboard motors. This high
quality oil demonstrates outstanding performance, exceeding the NMMA FC-W (Four
Cycle-Water) specification requirements. Formula 4-Stroke® Marine Synthetic Motor
Oil fulfills the warranty requirements of four-stroke outboard motor manufacturers.
NMMA Registration #FB-30011B 10W-30
Superior Protection Against Engine Wear
Marine engines operate under high loads and RPMs for extended periods of time, causing
traditional automotive oils to break down and lose viscosity. To ensure good protection,
the NMMA set minimum shear stability requirements for FC-W. AMSOIL Formula 4-Stroke®
Marine Synthetic Motor Oil greatly exceeds the FC-W shear stability requirements,
outperforming competitive oils to deliver a superior lubricating film. Formula 4-Stroke®
Synthetic Oil also contains robust anti-wear additives that further reduce wear
in metal-to-metal contact regions.
Excellent Anti-Rust Performance
Marine engines are prone to rust, leading to uncontrolled wear and premature engine
failure. However, good rust protection is not natural to engine oil. It comes only
by design. Formula 4-Stroke® Marine Synthetic Motor Oil is fortified with a special
anti-rust agent, even more than required to pass stringent NMMA FC-W anti-rust testing.
AMSOIL Formula 4-Stroke® Marine Synthetic 10W-30 Motor Oil (WCT) is recommended
for gasoline fueled four-stroke outboard, inboard, inboard/outboard (I/O) and personal
watercraft motors. AMSOIL WCT motor oil is recommended for the following applications
whenever an SAE 5W-30, 10W-30 or straight SAE 30 oil is called for:
- Four-stroke outboard motors: Honda®, Mercury®, Yamaha®, Johnson®/Evinrude®,
Bombardier/BRP®, Suzuki®, Nissan®, Tohatsu®
- Inboard and I/O: Mercruiser®, Volvo Penta®, OMC®, Chrysler® Marine, Crusader®,
Marine Power®, Chevrolet®, Ford®
- Personal Watercraft: Honda®, Yamaha®, Bombardier/BRP® (Sea-Doo®), Polaris®
- Note: AMSOIL Formula 4-Stroke® Marine Synthetic 10W-30 is recommended for
use in place of 5W-30 as specified by Honda®.
- NMMA FC-W API SL
- Four-stroke outboard motors and personal watercraft applications: Due to
potential fuel dilution or water contamination, change oil at the engine or watercraft
manufacturer recommended interval.
- Inboard and I/O applications: Change oil at two times the engine manufacturer
recommended interval or one year, whichever comes first.
AMSOIL Formula 4-Stroke® Marine Synthetic Motor Oil is compatible with conventional
and synthetic motor oils. Mixing AMSOIL motor oils with other oils will, however,
shorten the oil life expectancy and reduce the performance benefits. AMSOIL does
not support extended drain intervals where oils have been mixed.
Aftermarket oil additives are not recommended for use with AMSOIL motor
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). MSDSs are available upon request at 715-392-7101 or
on our website. Keep Out of Reach of Children. Dont pollute. Return used
oil to collection centers.
TYPICAL TECHNICAL PROPERTIES
AMSOIL FORMULA 4-STROKE® MARINE SYNTHETIC MOTOR OIL (WCT)
SAE 10W-30, API SL, NMMA FC-W
Kinematic Viscosity @ 100°C, cSt (ASTM D-445)
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)
Viscosity Index (ASTM D-2270)
CCS Viscosity, cP @ (°C) (ASTM D-5293)
Flash Point °C (°F) (ASTM D 92)
|Fire Point °C (°F) (ASTM D 92)||258 (496)|
|Pour Point °C (°F) (ASTM D 97)||-48 (-54)|
Noack Volatility, % weight loss (g/100g) (ASTM D-5800)
Four Ball Wear Test (ASTM D 4172 @ 40 kgf, 150°C, 1800 rpm, 1 hour, Scar
|Total Base Number (ASTM D-2896)||10.5|
|Humidity Cabinet Rust (ASTM D-1748) ||Pass|