TYPICAL TECHNICAL PROPERTIES
AMSOIL Formula 4-Stroke Synthetic 10W-30 and 10W-40 Marine Oils  (WCT, WCF)
 

    10W-30
(WCT)
  10W-40
(WCF)
Viscosity Index (ASTM D-2270)   152   154
Kinematic Viscosity @ 100°C, cSt (ASTM D-445)   11.7   14.1
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)   74.5   93.8
Viscosity Retention, % (ASTM D-6278 Kurt Orbahn, 30 cycles)   99.14   99.65
Pour Point °C (°F) (ASTM D-97)   -48 (-54)   -46 (-51)
High-Temperature/High-Shear Viscosity (ASTM D-4683 @ 150°C, 1.0 X 106 s.-1), cP   3.6   4.5
Four-Ball Wear Test (ASTM D-4172B @ 40 kgf, 150°C, 1800 rpm, 1 hr), Scar, mm   0.40   0.40
Noack Volatility, % weight loss (g/100g) (ASTM D-5800)   4.8   6.4
Total Base Number   10.5   10.5
Flash Point °C (°F) (ASTM D-92)   236 (457)   234 (453)
Fire Point °C (°F) (ASTM D-92)   N/A   N/A
NMMA FC-W Salt Fog Corrosion Test (SFT)   Pass   Pass
See our Technical Properties page for descriptions of these tests.
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Revised:

 

06/05