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

75% more engine protection against horsepower loss and wear.1
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
1Based on independent testing of AMSOIL Signature Series 0W-20 using the ASTM D6891 standard test.
2Based on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.
3Based upon independent testing of Mobil 1 Annual Protection Full Synthetic 5W-30 and AMSOIL Signature Series 5W-30 in ASTM D2896. Oils purchased in July 2020.