AMSOIL HD 15w-40

AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil is a premium diesel oil that provides excellent performance in all types of diesel engines where highly effective control of wear and deposits is vital. Engineered with heavy-duty dispersant/detergent additives, its Total Base Number (TBN) of 12 neutralizes acids and controls soot thickening from exhaust gas recirculation (EGR) and blow-by to protect against corrosion, cylinder bore polishing (wear), varnish and sludge deposits. AMSOIL 15W-40 Diesel Oil resists heat and breakdown better than conventional petroleum oils for long-lasting performance and protection. AMSOIL, the leader in automotive synthetic lubrication, produced the world’s first API qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL The First in Synthetics® to do the best job protecting your engine..

AMSOIL Signature Series Synthetic Motor Oil is designed to maximize energy efficiency for optimum fuel economy. Unlike conventional oils, its uniform molecular structure helps it flow more freely and reduce friction between metal surfaces. Anti-friction additives are included to further improve energy efficiency. Reduces Engine Wear Signature Series Synthetic Motor Oil provides outstanding anti-wear protection. It has excellent viscosity film strength to separate metal surfaces and robust anti-wear additives to further reduce wear in metal-to-metal contact regions for improved engine life.


Typical testAMSOIL-5w-20
Kinematic Viscosity @ 100°C, cSt (ASTM D 445)8.7
Kinematic Viscosity @ 40°C, cSt (ASTM D 445)50.2
Viscosity Index (ASTM D 2270)153
CCS Viscosity, cP @ (°C) (ASTM D 5293)4210(-30)
Flash Point °C (°F) (ASTM D 92)232(450)
Fire Point °C (°F) (ASTM D 92248(478)
Pour Point-53(-63)
NOACK Volatility, % weight loss (g/100g) (ASTM D 5800)5.5
@ 150°C, 1.0 X 106 s.-1, cP (ASTM D 5481)2.8
1200 rpm, 1 hr, scar diameter, mm (ASTM D 4172)0.35
Total Base Number (ASTM D 2896)12.6

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