Don't forget the fuel filter. You can still have the correct fuel pressure showing at idle, but may not have sufficient flow under load.


Avoid fuel additives and stay with tier 1 fuels. I traditionally only run Shell gasoline and have only replaced two O2 sensors in 344,000 miles and still have the original convertors.


2002 X5 3.0 344,000 miles
2014 428i 39,000 miles


2004 325i sold at 123,600 miles
2001 325i sold at 66,000 miles


1970 Firebird Under restoration