AMSOIL Signature Series 0W-40 Synthetic Motor Oil

Engineered for enthusiasts seeking maximum protection and performance. Precision-formulated with cutting-edge technology and a longstanding devotion to making the world’s best motor oil. The result: engine protection that blows the doors off the highest industry standards.

See the Product Data Bulletin for full details.

Fights Engine Wear

• 75 percent more engine protection against horsepower loss and wear¹ than required by the industry standard, extending the life of vital components like pistons and cams.
• Develops a strong fluid film that keeps metal surfaces separated.
• Robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life.

¹Based on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.

Signature Series Improves Startup Protection

AMSOIL provides better cold cranking viscosity, helping improve wear protection for engine components at startup.^PP

ASTM D5293 cold Crank (Lower = Better)

^PPBased on independent third-party testing in the industry-standard ASTM D5293 Cold Crank Simulator test as required by SAE J300.
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Signature Series Fights Wear

75% more engine protection against horsepower loss and wear.^A

Sequence IVA Engine Test - Lower Number = Less Wear