what's your m30 mpg?

[lukeADE335i]

Holy thread revival!

Anyway - with a 3.45 diff & 16x7s (205/50 R16 tyres).

I get 25mpg on the highway & 17-18mpg urban.

[F34R]

m30b35
3.25LSD
17x8/9
215/45/17(Front)
245/40/17(Rear)
Rear camber/toe correction for better tire contact
**not sure if that affects MPG due to more tire to road contact**

LBS: 2,340 something, I KNOW it weighs in at 2,428 with the old seats that are replaced with really light Recaros. I also removed more metal(skinned inside roof).

I marked out 9 gallons and drove to see my GF in Rochester and back(98% highway) with an average of 24mpg for the 206miles. I did a steady 68-73mph depending on passing etc, also the I90 is nearly flat with slight hills to go up and down. I did drive out once with my brother's wheels/tires running 16x7 with 215/45 square and noticed a slightly better MPG of around 1-2 more, but I would rather have wider tires for the type of driving I do with it.

**This has been with roof rack installed, I wonder if that affects MPG, I would assume so**

[Jean]

I can get anywhere from 30 to 35mpg with my m42.. Even got 40 once but it was a boring as f*** drive.. I normally get 20-25 mpg though.

thats cool Bro

[CorvallisBMW]

Yeah... this is a thread for m30 swaps.

I managed 27 coming back to Portland from BenDubs, 100% highway. I was very happy with that :)

[e30BMart]

I can get anywhere from 30 to 35mpg with my m42.. Even got 40 once but it was a boring as f*** drive.. I normally get 20-25 mpg though.

[Thingtwö]

Lead foot == bad gas milage!

I forgot to mention there has been NO change in driving style.

And I'll check the 02 sensor, thanks

[bme30]

New O2 sensor, if the old one is worn out.

[lashtx]

Fuel economy recently when down the drain, I used to get between 280-300 miles on a tank of gas and now I get about 180..... Any ideas on what could be causing this?

Lead foot == bad gas milage!

[Thingtwö]

Fuel economy recently when down the drain, I used to get between 280-300 miles on a tank of gas and now I get about 180..... Any ideas on what could be causing this?

[Thingtwö]

He did not downgrade, when he purchased it that is what the guy had on it. He is working on upgrading it to 1.3.

Kris

Oops didn't read the rest of the thread, thanks kris....so when's the dyne battle going down? But seriously we need to find that restriction of yours and get that spare 2.93 up under your ride.

[Thingtwö]

[QUOTE=CorvallisBMW;2649887]Why the fuck did you downgrade to M1.1? Not trying to be a dick, but c'mon, seriously... why?!?!?!

I didnt downgrade, I bought the car as is. Funny thing is everything needed for 1.3 is on the engine but it's obviously not hooked up all I need is the ecu and harness to swap to 1.3 but I figured I would just do some intensive research and do mega squirt when I get the harness and get everything hooked up.....give me a little credit :p

[E30SPDFRK]

A 4.10 diff on an m30? That's your problem right there.

If you look closer you'd see that the mileage stayed the same no matter what diff I ran.

It was quick with the 4.10 though lol. I tried that diff with the m60 and blew it up in 2 days.

[lashtx]

Why the fuck did you downgrade to M1.1? Not trying to be a dick, but c'mon, seriously... why?!?!?!

He did not downgrade, when he purchased it that is what the guy had on it. He is working on upgrading it to 1.3.

Kris

[CorvallisBMW]

b35
roughly 20-23mpg - mixed city and highway
early motronic
2.5inch exhaust no cat
motronic 1.1
2.93 lsd
215/40/17

+about 80-100lbs of tools in the trunk.

Why the fuck did you downgrade to M1.1? Not trying to be a dick, but c'mon, seriously... why?!?!?!

I've gotten between 19 and 24 with every engine I've had in this car: m42 got 24mpg on good days, 22mpg average. M30 got 20ish usually and the m60 gets a steady 19mpg. Thats about 50:50 mixed city and highway. On trips to far away shows with the m60 I get 26mpg cruising between 80-100mph.


But since it's an m30 thread
1991 318is
1993 m30b35
factory everything
s4.10 diff
e28 g260
17" BBS RF (boat anchors)
205/40/17
20-21mpg average


1986 325e
1992 m30b35
factory everything
s3.25 diff
e28 g260
16" BBS RX
205/45/16
20-21mpg average

A 4.10 diff on an m30? That's your problem right there.

[bmw335isturbo]

I just filled my tank for the first time this season... ouch! 15.7mpg lol.

e30 convertible
m30b35 with Miller WAR/MAF
3150lbs
17" wheels
3.73 LSD
mixed driving

gears + tunning you might see 20 with cruse control but that is about as good as it will get.