R robertcMember If you're running a race engine, don't buy oil at wal mart.Tim is on the right track.Amsoil, joe gibbs, etc, oils will work nicelyI can't see just adding stuff. I'm not a formulater, and can't do the extensve testing they perform.Can you? 3/25/106:53 AM Last edited by robertc 3/25/107:48 AM