Thread: 335is MPG
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      03-27-2013, 10:20 AM   #62
BLKSAPPE92
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Quote:
Originally Posted by mcpcolas View Post
12.5 mpg . No I don't track it,no mods, pure stock, mostly city Driving but still I don't think my mpg should be that bad. I use 93 octane shell or BP. Any reason that would cause this anyone?
You do have a xdrive? I have 09 335i with bmw performance upgrade I drive spirited and get between 18 and 20mpg with city and I have to say it I have been down to 17 once or twice and I know this probably isn't the reason but its only been when I filled up with Shell gas. Yes I know they are Top Tier but I normally Use Chevron/Texaco or Exxon/Mobile and I stay in the 19/20 with some hard city driving and Florida super long stop lights.

Now most of the gas stations I use say "May contain up to 10% ethanol" and I swear I have read on the side of shell gas pumps something like "Contains at least 10% ethanol" and read they try and go around 15% which would explain the worse mileage when I fill up with them but like I said it could be in my head like people swear they can feel the car run better when they change they oil.

Anyway my Top Tier stations of preference or Exxon/Mobile and Chevron/Texaco.
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