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fujioko
04-09-2006, 06:24 PM
Hi ‘ya folks,

Monday I’m going to the DMV and transferring the tag from my little E21 to my E34. The E34 was only driven by myself for a short while prior to replacing the engine.

The fuel economy on the old M50 engine was significantly low. The engine only ran on four or five cylinders.. really hard to tell. There was serious mechanical damage to the old M50, I haven’t done an autopsy yet, however I’m pretty sure there was a hole on the #2 piston.

Anyway I’ll be sorting the car out this week and I was curious as to the expected MPG the car should deliver. I can’t say I have any faith in the OBC or the silly meter in the tach.

The car obviously has the M50 engine. Its also fitted with a five speed stick. The car appears to run very well. I also don’t expect to be using the air this week. What should I expect?

BTW, I used to be a chassis dyno driver many years ago, I’m very familiar with the method used to calculate EPA mileage and the majority of “runs” yielded figures better than other dyno drivers.. just bragging..

smcgowan
04-09-2006, 06:50 PM
1993 BMW 525i
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EPA Fuel Economy

Fuel Type Premium Gasoline
MPG (city) 19
MPG (highway) 28
MPG (combined) 23

Fuel Economy Estimates From Drivers Like You

www.fueleconomy.gov

misfortune
04-09-2006, 07:00 PM
If you do more hwy driving than you'll get around 25ish. I remember bimmerd00d's e34 read 26 nearly all the time and I hate him for it

BMWDriver
04-09-2006, 08:34 PM
I personnaly get about 12.5 liters per 100 km, on average. I do half my travels to work on highway and in town against traffic, and I often rev her up to about 3k before shifting. (I think it's about 22-25 mpg) More like 8-9 liters per 100 km on the highway when I go on a longer trip (don't ask). Not as bad as I had thought. And that's not bad for an engine with 390 000 kms (242 000 miles).

It could depend also on if you have a VANOS engine or not. If I recall correctly, from manufacture date 09/92, e34 got the VANOS version of its perky engine. Mine is 07/92.

Kalevera
04-09-2006, 08:41 PM
Not sure of the mileage on an M50 e34, but I do know that if the old engine has a hole in a piston, it wouldn'tve run at all.

A calibrated OBC is quite accurate.


best, whit

hakwuzhere
04-09-2006, 08:59 PM
I drive like I stole mine, and I get about 19.5 or so...

BigTed00
04-09-2006, 09:19 PM
thats nice, i drive my M30 like I stole it and get 15 mpg