How many miles per tank are you getting?

[reelizmpro]

How many miles per TANK are you getting with your M/S50 swap?

Please designate what year model E30 and engine M50/S50/EuroS50, etc. Thanks.

[1990m3]

'91 318is

'95 s50, '95 m3 trans, 3.46 diff, 24lb injectors, 3.5" HFM, 10lb flywheel

240-260 miles per tank city. 300 on the highway.

[mentaleeill]

88 325
92 nonvanos m50 lightened single mass flywheel, 19# injectors, getrag 260, 3.73 lsd, jim c chip, and hot air intake.

i get about 250 to the tank city, closer to 300 if im on the highway.

[BimmerToad]

'91 318iS, stock tank (smaller than 325 iirc ... ~13.5 gallons)

'97 M52 2.8L, 21.5lb injectors, S52 cams, Getrag 260 w/ a 4.10

260mi city, 310mi highway. Usually I run around 270-280 from combined driving.

I thought my 4.10 would surely kill my mileage compared to you 3.73 guys.

[cahomey]

90 coupe, full stereo, rear headrests

92 vanos m50 bone stock, hot air intake, getrag 260 & 3:73. Average 300-315 a tank (city & highway)

280 if the majority of my driving was in the back roads.

[02stu]

I'm getting about 200 miles in the city... wtf!

[qimis]

^^^ That's what I got too! I used to get 260s last year, not sure what happened ...

S50.

[SchnellerVert]

Sounds as thou you have some tuning issues or poor running issues.

[1990m3]

o2 sensor maybe. I put in a new one and went from 200 per tank to 240 in the city. Passed emissions too, go figure!

[325Projectz]

91 m3

s50 zf 3:25

300 miles highway @ 80 + city + beating it up

340 all high around 65 - 70.

[tonytony]

91 325i

m50 non vanos, getrag 260 tranny, 3.73 diff

mods:

lightended m20 single mass flywheel
underdrive pulleys
CAI
fan delete
dinan chip
custom 2.5in ehxuast with obd2 exhaust manifolds

360 miles per tank, combined city and hwy

[iwantone]

im getting around 260 for about 11 gallons of fuel.
so thats around 23.5mpg mixed driving. 27mpg if mostly highway.
but i think i lose .5mpg with my snowboard attachment for the roof rack...

m50 non vanos, 3.73 diff.
dinan chip.
ebay headers
crap exhaust with hollow muffler

i dont know how you are getting 360/tank tonytony.
im like the most calm/slow driver ever and i get only 260, wtf?

hoping to do the electric fan, and some underdrive pulleys. maybe thatll help.
but i think i need to do a tune up. i want to be getting 360/tank!

[SchnellerVert]

I can see it. I know of a car that gets 320 miles out of 3/4 tank on the small tank car with consistent 80mph with ZF and 3.25lsd that is 27 mpg.

[OoPEZoO]

im getting around 260 for about 11 gallons of fuel.
so thats around 23.5mpg mixed driving. 27mpg if mostly highway.
but i think i lose .5mpg with my snowboard attachment for the roof rack...

m50 non vanos, 3.73 diff.
dinan chip.
ebay headers
crap exhaust with hollow muffler

i dont know how you are getting 360/tank tonytony.
im like the most calm/slow driver ever and i get only 260, wtf?

hoping to do the electric fan, and some underdrive pulleys. maybe thatll help.
but i think i need to do a tune up. i want to be getting 360/tank!

It could have a lot to do with your diff ratio. This is kind of apples to oranges, but it should get the point accross. I was running a 3.46 in my 325es for the past few years......I worked close to home and it was a blast around town. I usually got around 23-24 MPG with mixed driving. Last summer I changed jobs (now I commute 600 miles per week), and the 325es has been designated the commuter car. The RPMs were WAY to high for highway cruising so I swapped the differential over to an early ETA ratio of 2.79, and now I reliably get 28-30 mpg during mixed driving. It dropped my RPMs by right around 800 RPM for any given gear/speed.

It doesn't seem like much, but considering the 5-6 MPG difference and lets say 14 gallons of gas......thats 70-84 extra miles per tank. Now if you figure in a more efficiant M50 versus a 220k mile worn out ETA motor......I think you could easily get there by dropping your diff ratio a little bit.

[iwantone]

so e30s have a 14 gallon tank? wow.
my needle gets really close to the R at around 11 gallons, so thats when i usually fill up. i guess i could get around 70 more miles out of the tank if i take it all the way up to 14 gallons.

we need to know how many gallons of fuel people use up as well to figure out the mpg numbers. that is more reliable than how many miles a tank, cuz people fill up at different points.