AMSOIL Signature Series 5W-20 100% 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.