The rising gas prices have got me wondering... with all of the additives that Petro Canada puts in their gas - "tactrol" (now 50% more), antifreeze, corrosion inhibitor - would it decrease gas mileage?
My thought would be that the more "other stuff" in your gas, the less gas there is and the less mileage you'll get.
I've never filled up anywhere but petro canada (petro-points), so does anyone have any experience with Petro canada mileage vs. other gas?