yeah, sauce is like tire selection. Its something you ask the local fast guys about. There are many local brews that are custom maid for the local tracks. I have heard of "hog snot" somewhere on the east coast, BK sauce here in arizona and a few others as well. But the sauce you use can effect different tire compound differently. If you can get a local to let you borrow their sauce and take a few laps, you can decide for yourself if you want to use it/buy it. Since BK sauce is big here, I might try it out next time I hit up the local indoor track.