I get about 30 mpg in Atlanta. If I'm sitting in traffic a lot and inching along, with the a/c on, then I only get about 25-26. But mostly, on the dot every refill, I get 500 miles per refill (I probably still have 2 gallons left by the time I refill; the low fuel light comes on with 2.5 gallons still in it, or so), which is 30 mpg, almost every time. I get about 35-36 on the hwy.

Try some Diesel Kleen in the tank, might help clean out some injectors. Even without it, I get 30 mpg, I've never checked with it, but it does make my car run quieter, and they say gives up to 5% better mileage due to its ability to increase cetane levels. Check your pre-filter, make sure it's clear and not dirty. Empty all your lead weights out of the trunk so you're not carrying excess weight.

Good luck.

jeff 1991 300d, 114k