Our commitment to innovation has resulted in legions of brand-loyal customers.
AMSOIL specializes in developing synthetic lubricants that offer innovative answers to the greatest challenges vehicles and
The extraordinary performance of AMSOIL synthetic lubricants in a range of markets – automotive, powersports, industrial, racing and more – have made our influence in the industry unmistakable and our brand highly respected.
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Signature Series Synthetic Motor Oil is the top-tier AMSOIL synthetic motor oil. It is designed for motorists who want the convenience of a once-a-year oil change combined with maximum engine protection, extreme-temperature performance and fuel efficiency. Signature Series is formulated to exceed the higher performance requirements of modern engines in everything from family sedans to high-powered sports cars, providing peace of mind that your engine is well-protected, even
in severe driving conditions. Its guaranteed 25,000-mile/12-month drain interval (normal service) saves you time and money, and reduces waste oil, helping the environment.