How bad is your MPG?

[nickpdx]

Mine usually fires up after about 2 seconds (about the same speed as most other cars), but occasionally (seems to occur most on hot days or starting when the engine is still hot) I'll have to crank for maybe 6-8 seconds. I've read of the same problem happening with lots of other people. Haven't looked into the issue at all, but I would like to get it taken care of.

[James Crivellone]

26.9MPG in my E28 525I
Who gives a shit in my E30 328IS
18City/20HW on my 07 Xterra 6SPD

[e34john]

My 21 year old sports car gets better gas mileage!!!

What kinda car is it?

[tjmonsen5]

14 here around campus, i never get above 3rd gear though. Driving around in low gears eats my mileage.

But when im at home, 21 in town, and 29 on the highway when i drive to and from school.

This is in my 87 325is 5 speed.

[kamotors]

I get about 260-280 miles on a full tank and I enjoy flooring it alot.

[Just4kicks]

'89 M3 2.5L About 20 City 25 Highway '90 M3 S38 19/27 (Tall gears) the last time I checked.

[PiercedE30]

'90 329is (stroked M50 to 2.9L) with 4.10 gears, 28 lbs injectors, cams, the works, gets about 20-24. The best I have been able to get (cruising at about 70 - RPMs were right around 3500 or so) has been 24. Most of the time I get 20 due to going about 80 (RPMs are around 4000). Hopefully the 3.73's I have will help a little, or I could just throw the 3.25's in.

[nando]

I get about 19mpg in my car; 17 in the city and up to 23 on the highway. 2.8 M20, 42# injectors, 4.10s, cam, MS, etc. Tuning low load areas for economy can be tough..

How about the temp sender for the ECU. I know it has an affect on mixture when cold. Not sure if being faulty would cause a rich mixture at normal temps however.

Also, he meant temperature not as in how you warm the car up, but how warm the car gets. A low temp thermostat will make the car run cooler, sometimes too cold.

a bad coolant sensor would affect how the engine runs at all temps.

[rThor432]

My M42 gets 33-34 mpg all highway. But the car turns 4k rpm while cruising.. damn 4.10.

My eta got 35 driving all highway-- no matter how hard I drove it. But it could only turn 4300 rpm tops. Love the 2.93.

[nosignal]

My E30 pulls in great mileage, at least low 30s in combined driving (when the AFM is working properly anyway) and ~35 on all-highway trips. I'm averaging 23.2MPG around town in my E34 540i.

[Red88]

21.72 over four months. About 3600 miles, <80 on the highway. Highway from Tucson, AZ to Tuckee, CA by way of San Diego and Berkley I got 27.69.

Autotragic if anyone wants to know... :(

[gearheadE30]

I get 27 around town with 100% city driving and mostly with the motor cold. Stock M42 with Mark D 93 octane chip, 4.10 rear end, magnaflow, and minor intake work fwiw. Also has an electric fan. I usually don't beat it, though, because the engine is always cold. It pretty much stays below 3 grand.

On the highway I tend to average 38-42 mpg, but I like drafting semis.

[S14pwrdE30]

I get ~25.5 mixed in the M3.

[323iNathan]

I get about 10.5-11L per 100km, or about 22MPG in my m20b25 mainly city driving.