Joe Rampino
Active Member
With the cost of fuel, I'm looking to save in any way I can. My wife's Audi requires a minimum of 91 octane. I usually try to find a Sunoco that has 91, but if I can't, we end up going for the high price 93 from one of the other stations around here that offer 87, 89, & 93. I usually fill up at half a tank. So if I alternate every other half tankful between 89 & 93, will that average 91?