In Reply to: Re: What is average MPG on 91 E34 M5? posted by Simon 93 M5 on February 14, 2001 at 20:43:30:
Yeah, that does seem normal. I average just about the same, 14mpg city/24mpg highway in my '92 M5. Overall I get 17mpg.
A few months ago I bought a 91 E34 M5 with B@B Tri-Flo exhaust and Dinan chip/suspension. I am getting around 13.5 MPG!?!?! Is this unusaul? I put Techron and Heet in the gas tank, but the improvement was only 3/10 mile. Anything else I can do?
Any advise is appreciated
That is normal for city driving. On the highway (75 mph) you should get about 23mpg.
Owned mine since 91. 15 MPG city/ 22-23 MPG HW @ 75-85 MPH.