*In-Store Purchases Only
 
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.
 
Fights Engine Wear
75 percent more engine protection against horsepower loss and wear 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.
50% more cleaning power vs. AMSOIL OE Motor Oil
Protects turbochargers 72% better than required2 by the GM dexos1 Gen 2 specification.
28% more acid-neutralizing power than Mobil 1.3
Trusted by professional engine builders
Guaranteed protection for up to 25,000 miles or 1 year