Originally Posted by BMW_M_POWER
just hibernated over the winteer lol, gota fix the car before summer. Its drinking gas like its free lol
I had a similar situation. My check engine light came on. Not sure about mileage as I dint rest till i fixed it. Turned out that the gas filler cap did not keep pressure. check engine on the E38 is usually exhaust related. I know a guy in streetsville who can scan your car. Let me know if u need assistance.
(Hate to see these cars suffer)