STA-BIL, AMSOIL, and Archoil were close behind, but the Lucas and Stanadyne additives couldn’t keep the diesel from freezing into a solid brick. This test isn’t going too well for them.

We used both Amsoil and SPEEDiagnostix for our testing and with the freshly rebuilt engines we expected and did see high wear metals like iron in the oil. While a single test can be helpful ...

This episode of Engine Masters, presented by Amsoil, is here to answer that for you, testing various levels of destruction of a set of Hooker headers on a 550-horsepower, 400ci small-block Chevy ...

But is it true? You’ll find out on this episode of Engine Masters presented by AMSOIL, as we use a 7,000-rpm, small-block Chevy to test stock-type stamped-steel rockers, roller-tip rockers ...