okay so in a couple weeks iam about to drive 4000 kms across Canada back to Toronto... and I was thinking of filling up with regular gas rather then premium threw out my trip... save a bit of money.... would like to know if my mpg will suffer or will my car suffer from this... or should I stick with mid grade/premium
Ironically, believe it or not, you may actually see a slight increase in mpg by using 87 octane. There is more energy in a gallon of 87 octane gasoline than there is in a gallon of 91 octane fuel. The 87 octane doesn't have all of the additives to slow down the rate of burn.
I say do it!
Especially on a long, steady speed trip.