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X3 E83 (2004 - 2010)
Talk about the E83 BMW X3 in this forum!

 
 
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Old 01-04-2013, 08:23 PM
halltristan's Avatar
halltristan halltristan is offline
Bimmer Enthusiast
Location: Tennessee
 
Join Date: Feb 2012
Posts: 652
Mein Auto: 325i and X3
Low Gas Mileage

I'm only averaging about 15 miles per gallon and I don't understand why. That's completely city driving with almost no highway at all, but even on long trips I get about 18 mpg.

Vehicle is an 2005 3.0L. Runs perfectly fine. I changed spark plugs, flushed all fluids (except tranny), and changed air filter last month. I only use premium 93 octane gas. Next on my list is to change the fuel filter and perhaps that's the culprit. Anyone else have any idea or similar problem?
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