No, AMSOIL motor oils are motor oils. It is not an additive that you add to your current oil, but is a replacement for your current motor oil. Because it is created in the lab, it does not contain the impurities that petroleum motor oils do. This allows it do do a better job of protecting your engine, and does so for a much longer time than petroleum oils do.
This allows AMSOIL synthetic motor oils to protect your engine for 25,000 miles or 1 year, instead of the 3,000 miles or 3 months like most other oils recommend.
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