What is your full tank range?

[jlevie]

i did an engine swap and i swap the speedo cluster from my 87 to my 89 325i. then, the fuel gauge was acting up and saying it was empty but there was still half a tank of gas in it.

^ This. There is a difference between early and late (I don't know the cut off years) fuel gauges late=2 senders, early = 1 sender.
I would check that first to make sure they are compatible.

The early gauge is used with 325's that have the 55L tank and I think all 318's. The cutoff date for the gauge in a 325 is 8/87, same as the tank.

[gath]

300+ miles?!? Yup there is something serious fucking wrong with my E30. HELL I got an ETA and I don't get those miles. I think it might have to do something with my gauges, as it was swamped out by the PO with an i cluster. hmmmm.....

You can calculate without worrying about cluster.. Jus drive until it's completely empty - you wanna have a 5 gallon of gas in the trunk, add the five and drive to the nearest gas station, top it up and see how many gallon + the 5, the drive until empty again for the total miles.

[Massimo]

I can't get about 7.2l/100km that was calculated using my odometer and how much fuel I filled up at the gas station so thoretically I should be able to get about 750km from one tank.

[scottinAZ]

my eta gets about 280-320 until the light comes on. Dont have the balls to run it till it quits. Average fill up after that mileage is 11.9-12.9 gallons

[Ian Bowers]

330-350 with my M42/3.73, I generally put around 12 gallons in it. I've gone 380-400, but the light came on at that point, and it took something like 13.5 gallons. Mixed city/hwy.

[bmwm42]

At least 350 m42 3.73 diff mixed driving

[bernzpeed]

Damn, I want an M42.

[bernzpeed]

finally changed my fuel gauge and everything is accurate.

[freeride53]

Damn, I want an M42.

Crack is whack.
Just kidding. :D (it is of course, whack)

[BrettsE30]

Im getting 250 to a tank. 87 325i vert

[Victell]

318is, about 310-320 miles per tank, 87 octane. Mostly freeway driving @ 80. When not on freeway I mash it pretty consistently. I go WOT every day I drive it.

[sweet6e30]

i get around 400km for a full tank, mostly highway but i have a heavy foot ( 88 325i) fresh motor

[long tall eta]

380 or so in my eta with a chip and a 3.25 lsd. mostly highway around 75 to 80 mph.