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      11-16-2012, 06:08 PM   #21
swartzentruber
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Drives: 2011 E90 M3
Join Date: Oct 2008
Location: Chicago NW suburbs, IL

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Quote:
Originally Posted by robbiedawg View Post
in my more cynical moments,i sometimes wonder is there are really 3 grades of gas,or if they all come from the same tank.
There are not 3 grades of gas, only two (premium, regular). Plus is a mix. If you've ever purchased Costco gas, you'll notice they only sell those 2 grades.

To the OP, given your extensive documentation of prior tanks, I'd say there a good possibility it is either regular gas, or has another issue. After the shortages, as you say, the delivery tankers and/or the stations may have just figured that people would be happy getting some gas, and not deliberately trying to rip people off, though it of course sucks paying extra for premium and not getting it. Another possibility is the gas got too high of a mix of ethanol.
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