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      01-23-2013, 12:24 AM   #6
mcpcolas
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Drives: 2009 montego blue 335i xdrive
Join Date: Apr 2012
Location: new jersey

Posts: 363
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Quote:
Originally Posted by ovaltine224
I just noticed my cars been burning alot of fuel these past two weeks. The dashboard says im doing about 14mpg.

Here's some recent info:
-In december, I had codes for all four O2 sensors. Mechanic had a hard time figuring out the cause but turns out to be PCV short which I replaced.
-Replaced oil filter gasket
-Oil change
-Vehicle inspection
-Added power steering fluid
-Added window washer fluid
-Added engine coolant (I decided to just add PEAK coolant)

Car was running fine for a few weeks until just now I noticed I started burning more fuel. I just ordered a new air filter hoping that it might help.

Any ideas on cause? Maybe related to the repairs or coolant I added?
I'm in the same boat as you I'm averaging 10mpg. everytime I take the car to the dealer for that . They keep telling me the engine is running fine there's no code in the dme . My car Is stock
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