AMSOIL was founded on innovation, beggining with our introduction of the world's first API-qualified synthetic oil. By ignoring commonly accepted limitations and refusing to stop short of success, we set a new benchmark for lubricant performance. These same principles continue to guide our product development, resulting in Signature Series Synthetic Motor Oil. Signature Series is not only the best oil we have ever made, it’s also better than any competitor oil we have tested. Some may claim that Signature Series is over-engineered. Perfect. It’s not for everyone. It’s for those who want the absolute best engine protection — and it delivers.

Do you drive in hot temperatures?

50% more detergents to help keep oil passages clean and promote oil circulation. Provides 90% better protection against sludge.

Do you have long commutes?

28% more acid-neutralizing power than Mobil 1, helping engines stay cleaner, longer. Reserve protection so you can go up to 25,000 miles, 700 hours of operation or one year between oil chanages, whichever comes first.

Does your vehicle have a turbocharger?

72% better turbocharger protection than required by the GM dexos1 Gen 2 specification.

Do you tow or haul?

AMSOIL fights viscosity breakdown 46% better than Mobil 1, providing superior protecton of pistons, cams and bearings.

Do you drive in cold temperatures?

AMSOIL synthetic motor oils make cold starting 39% easier than conventional motor oils.

Do you want extra engine protection?

75% more engine protection against horsepower loss and wear.

Check out the range of Signature Series here.