Ok, I think I was wrong. After reading the posts in the oil forum about which oil is a good cleaner, it sounds like I should still use a product like Auto-rx. Question is, can I add it to Amsoil? And when I run it for 500 miles to the added oil, can I put Amsoil back in or do I have to use a Dino? Forgive me if I asked this already....I can't find the **** posts...there are so many to go through.