So I have a question here I hope some of you can answer. Over the years I've read alot about Synthetic oils and it seems that Amsoil, Mobil 1 and Royal Purple are the favorites, with Amsoil being the top dog.
My question is, what makes Amsoil (or any other brand for that matter) better or worse than another brand of synthetic oil? Is there any kind of proof as to which brand is actually better, or is it a preference thing?
My question is, what makes Amsoil (or any other brand for that matter) better or worse than another brand of synthetic oil? Is there any kind of proof as to which brand is actually better, or is it a preference thing?