I've used a bunch of different brands of oil over the years in my race engines...Amalie, Valvoline, Amsoil Schaefer etc. Never an issue with any of them. Home - Cen-Pe-Co Lubricants This will be the first time I'm running methanol in MY engine so I needed a dino oil (or semi synthetic). I went back to an old standby from the 80's. I ordered two four gallon cases of CenPeCo 30W. I used this stuff in my otr trucks with good results and ran it in my Ford dirt track motors, too. I decided to go back to a single grade oil because if the methanol use and not having the oil loaded down with additives that make it a multi grade. So 30w it is... $151.00 for two four gallon cases of the stuff. Good price and the local dealer seems like a good guy.