Nick R
Thread starter
You ever heard of something called thinking at the margin? The point of diminishing returns. As in, PP may not be as good as the Amsoil, but it is still very good, and it is 1/7th the cost for oil that is near its equal. And for another 1/7th I can add a ton more moly and boron, which IMO, makes it even better than the amsoil.