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 (see Four-Ball Wear Test graph).
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Click on graph
to see larger image
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While automobile engines normally
operate at around 2,500 rpm, outboard motors can run twice as fast, requiring greater levels of
wear protection and better bearing durability than automobiles. In addition, prolonged idling
and low operating temperatures contribute to fuel dilution, further thinning the oil. To ensure
adequate protection for their engines, marine engine manufacturers set minimum high
temperature/high shear (HTHS) viscosity limits. AMSOIL Formula 4-Stroke®
Marine Synthetic Motor Oils are shear stable and
formulated with sophisticated oil additive chemistry, exceeding the HTHS requirements of both
the API and NMMA FC-W (see graph).
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.
Applications
AMSOIL Formula 4-Stroke® Marine Synthetic 10W-40 Motor Oil (WCF)
is recommended for gasoline fueled four-stroke outboard, inboard, inboard/outboard (I/O) and
personal watercraft motors. AMSOIL WCF motor oil is recommended for the following applications
whenever an SAE 10W-40, 15W-40, 25W-40 or straight SAE 40 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-40 is recommended for use in place of 25W-40 as specified by
Mercury®.
NMMA FC-W • API
SL
Service
Life
• 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.
Mixing AMSOIL
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 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). MSDS’s are available upon request at 715-392-7101 or on our
website. Keep Out of Reach of Children. Don’t pollute.
Return used oil to collection centers.
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TYPICAL TECHNICAL
PROPERTIES
|
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AMSOIL
FORMULA 4-STROKE® MARINE SYNTHETIC MOTOR OIL (WCF)
SAE 10W-40, API SL, NMMA
FC-W
|
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Kinematic
Viscosity @ 100°C, cSt (ASTM D-445)
|
14.1 |
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Kinematic
Viscosity @ 40°C, cSt (ASTM D-445)
|
93.8 |
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Viscosity Index
(ASTM D-2270)
|
154 |
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CCS Viscosity, cP
@ (°C) (ASTM D-5293 )
|
6871
(-25) |
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Flash Point °C
(°F) (ASTM D 92)
|
234
(453) |
| Fire Point °C (°F)
(ASTM D 92) |
254
(489) |
| Pour Point °C (°F)
(ASTM D 97) |
-46
(-51) |
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Noack Volatility,
% weight loss (g/100g) (ASTM D-5800)
|
6.40% |
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Four Ball Wear
Test (ASTM D 4172 @ 40 kgf, 150°C, 1800 rpm, 1 hour, Scar in
mm)
|
0.40 |
| Total Base Number
(ASTM D-2896) |
10.5 |
| HTHS
(cP) |
4.6 |
| Humidity Cabinet Rust
(ASTM D-1748) |
Pass |
