Tag Archives: Royal Purple

Simply Add more Engine Life with Signature Series In general, 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. TBN levels decrease as the oil remains […]

From the President In late 2017 we conducted an extensive survey of AMSOIL Dealers. We wanted you to tell us what you need and where we can help, so we hired a firm to help us develop a scientific approach designed to get honest feedback. We gathered data from new Dealers, longtime Dealers, former Dealers, […]

Leading the Field in Deposit Protection Testing proves AMSOIL Signature Series 5W-30 Synthetic Motor Oil provides more complete protection against damaging deposits than competitors. The push toward smaller, fuel-efficient engines yielding more power drives the development of key technologies. Gasoline direct injection (GDI) and turbochargers are here to stay. By 2020, industry experts predict that nearly […]