Originally Posted by vwgti123
I'm not, I do significantly more hwy than city and have only reached 30mpg once! (all hand calc) Oh man that was a good day with my imprezza.
I know we do not need to use higher octane rating than 87, but I've ran 91 from signal stations that had zero ethanol in the 91 octane and have had over 30 in all but my first tank ( hand calc). Maybe my car is different or something. I know from my truck that I was better off spending more per gallon with the same 91 oct than the cheaper 87 from a ROI standpoint.