gas mileage

[cee28o]

i own a 96 c280, the one with the inline-6 motor. i have noticed a dramatic change in the gas mileage i've been getting, from when it was new until now, before i would get about 300 miles to a full tank but now i only get low 200's. is this normal or is there somethign i should be worrying about? and also, i would like to kno wut kind of mileages are you guys getting out there, from a full tank. Thanks in advance. any help is highly appreciated.

[jnenad16]

there are quite a few threads about gas mileage, do a search. you might also check out these:
http://www.club202.com/forums/showthread.php?s=&threadid=8573&highlight=cheap
http://www.club202.com/forums/showthread.php?s=&threadid=5613&highlight=optimal
http://www.club202.com/forums/showthread.php?s=&threadid=5614&highlight=optimal
also, keeping your car tuned makes a big difference in gas mileage and performance. dirty oxygen sensor is another reason for bad gas mileage.

nenad

[roundeler]

If you experience a big drop in fuel economy on a newer car. Your car is probably retarded, i mean retarding your spark to avoid knock or poor fuel combustion. Either the knock sensor or most likely the oxygen sensor. You get less bang for your buck/power with a retarded car. Nothing to greatly worry about, but it will shorten a motors life from 200k to 150k, if it were to run the life of the motor like this.