Typically, these oil blends feature a number of additives one can purchase separately, with a major component being ZDDP, more commonly referred to simply as zinc. The amount of zinc your classic ...

How old, you ask? Well, if you're rocking a V6 or V8 made before the mid-1980s, you're probably going to want to throw some zinc additive into your crankcase every oil change. In the pre-roller ...