Quote:
Originally Posted by sunny5280
In one of the many discussion over at Bimmerfest about premium versus regular octane fuel someone posted some stats regarding fuel economy for both premium and regular fuel. From what I recall the premium had better fuel economy which essentially offset it's higher price. I'll see if I can find the link to it and post it if I can.
Hit me up when you get to Denver. I've got a great BMW indy mechanic who will treat you right.
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You will easily get better mileage with the premium. I experimented with a 2006 Altima (i will never put reg in my current cars since everything here has ethanol except prem) filled with reg 89 and got 24 to 26mpg hwy 70 mph for 5 days. then filled with 91 did the same commute for 5 days and got between 29 and 32 mpg.