It is like they said above.. It is the ethanol. I run Costco/superstore because it is cheaper and it uses no ethanol. Husky and petro use ethanol.Originally posted by Mitsu3000gt
Glad it helped!
Wow that is quite a bit extra mileage just form gas brand
Last time I went to the states they use ethanol blended 91 and it is shit. My mileage dropped by probably 20%.