Lucas makes an additive for ethanol and I am sure it works as Lucas is usually pretty good stuff.. I havent researched if BG products makes an additive for ethanol. BG products are good stuff, I dont know of any major part stores that carry BG products, last I knew about the only place to get them was from a dealer. BG is out of Wichita Ks and I was lead to believe that at one point (this was several years ago) they brought in the head chemist from Valvoline that had just retired and let him go nuts on making products...