Originally Posted by DJ Apex
So i just put a full tank of 93oct today and guess what avg 16.6mpg! lol not useing the cars mpg reader thing this is doing the math after filling up again!
Did you really use all 17 gallons of gas in one day?!
Fill with 93 oct for a month and see if it improves. The lower grade of fuel can only hurt, and less than $5 a tank is a good investment in your BMW