Signature Series 5W-30 Synthetic Motor Oil 100% ORIGINAL GARANSI AMSOIL 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 % 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.