Thread: Fuel economy
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Old 12-29-2012, 08:09 PM   #7
jfoj
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Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 9,283
My Ride: '06 330CiC, '03 M5
What elevation are you at in Colorado?

Might be Winter fuel blends?

First change gas station and blend and see what values you get by manually calculating mileage.

Make sure your thermostat is good, see 3rd link in my signature, display coolant temp on OBC display, should be around 95C.

DISA and VANOS seals play into mileage as well.

For DISA info, see first link in my signature.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
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