380SE What MPG do you get?
 

I now have my car I think runs perfect after alot of set backs and lots of searchs the car runs GREAT. But my mpg is awful. It is only getting 13 :confused: in city and 17 on the road. That is 75 and 80 though. But my 420sel way bigger car gets 18 and 23 with the same type of driving. I guess the rear gear ratio is getting me because the 380 is very fast out of the hole. :) I do know that it uses 1st gear all of the time. I did not think that would eat that much gas. Thanks Alan

The second gear start off was done for the specific purpose of increasing fuel economy. Also, I dare say that the 420SEL's fuel delivery system and engine are more advanced and efficient than the 380SE.

Gas mileage
 

My 85 380se has 204k. I've only had it for a couple of weeks. Just replaced plugs, wires and all that stuff. I just checked my mileage and was pleasantly surprised! 202 miles on 10.3 gals. That works out to 19.6 mpg! That's combination city and highway driving. 70-85 on the highway trying to work the bugs out. This car has been sitting for two years and has an idle control problem. Hopefully with the idle fixed and a new fuel filter it'll get even better. I love these cars!! Have you had a tune-up lately? Also check for dragging brake, I had one binding on the right rear :eek: That'll suck up some gas!! Good luck.

combined mpg 19-22. 189,000 mi on the meter.