In Reply to: Gas mileage on the "Big 6" posted by Tim Collins on March 28, 1999 at 12:49:52:
Reading all these follow ups makes me feel better about getting the 4 valve motor. I chipped it, exhaust and K&N. Big improvement in power and 25 MPG combined. I've found that my OBC is short 1-2 mpg.
'94 525i 5sp