I found acompany called diesel secret energy and am just wondering if any body else has tryed there product or one similiar it gives ya a formula of mixing used vegetable oil with a little gasoline and thier "special" additive and one other thing and then mixing and filtering it they claim just fill up your tank and go. Obviously i am afraid to put something in my 06's tank, other than pump diesel for obvious reasons but if any one has had any experience with this or a similiar product whatever feed back(good or bad) would be greatly appreciated thanks!