I put a couple of gallons of 110 race unleaded mixed from my shee, Truck did not like it, its a 89 1ton gmc with a 350 throttle body injection, runs like shit, wants to stall out now. I think the computer has a hard time reading the o2 sensors. I have'nt scanned it yet to see what codes are pulling up, just parked the truck for winter, I'll look at it when spring comes around.