Originally Posted by jet_mech_tech
Not sure the way fuel works south of the border but up here in Ontario, I switched from regular 87 octane (containing at least 10% ethanol) to Shell supreme 91 octane (which contains 0% ethanol). Not sure about power but I definitely get better mpg. I think its the ethanol factor myself, but since ethanol is in everything up here except supreme, I'll stick with the 91 octane.
On a side note after crunching some numbers, I spend $6 more to fill up on high test but would spend about $8 more to get the same km's on regular gas .... so i'm still farther ahead.
i find shell supreme works best in this car as well as my f150.way better mileage then say petro canada