Amsoil Signature Oils Cleans Up The Competition

The total base number test (TNB) measures the additives in motor oil. The higher an oil’s TBN, the better its ability to neutralize contaminants such as combustion by-products and acidic materials. Higher TBN oils neutralize a greater amount of acidic material, which results in longer oil life and cleaner engines. AMSOIL has a large dose …

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