Thread: Low Gas Mileage
View Single Post
Old 01-05-2013, 06:46 AM
X3-terrestrial's Avatar
X3-terrestrial X3-terrestrial is offline
Location: N.Miss - Memphis,TN Area
Join Date: Aug 2008
Posts: 2,781
Mein Auto: '05 X3, '02 M3, '89 MkI
Originally Posted by AzNMpower32 View Post
and unless you're resetting your Board Computer on the hwy drives,
^^Very important point!

O2 sensors will trigger a CEL when they fail, but I've read that they start losing "optimal "efficiency after 100k. I still have mine at 125k miles as well but probably will change them before 150,000.
"If everything seems under control, you're just not going fast enough"
-Mario Andretti.

River City Bimmers BMW CCA
2005 X3 3.0i ZPP, Htd seats, Htd strng, Black Sapphire on Terracotta. (08/2008-Current)
2002 ///M3 Coupe, Steel Gray Metallic on black leather, HK, three pedals.(01/2015-Current)
Reply With Quote