Hell I burn SYN, ATF, 2 Stroke...lol. I dont have CATS. Heck..dont have a muffler lol. I am still chipped at max setting. I wont exceed 50% though and I am in Ca..so temps are very mild. I plan on running a 55g drum through a hand pump, through a oil relocator from napa so I can filter down to Oregon 101's numbers. I am running out of Levis lol
if all you are using is old jeans hook up with a local used cloth store. one guy here was getting the ones that dont sell for like $1 each.
i have burned synthetic without a probelm but it wasent any stronger that a few gallons a tank since that is all i had.