Originally Posted by superkev525
With my '93/4 525 TDs auto, with standard ECU EEPROMS, and 134K miles, Im getting a little over 100 miles per quarter tank marks on guage, so maybe up to 500 miles to a tank-full--I dont let the tank go below quarter--Its a personal thing! ....
Im currently running 100% BioDiesel fuel, but will go back to veggy oil in the summer...........
Guess you should get around the same--These are not known for their economy!--BUT Oh, what a great diesel engine![]()