24v swap miles per tank - make no sense.

[graphikg]

My s50 gives me about 310 miles when the low fuel light comes on. I am sorry but that sounds rediculous. My e36 m3 gets better mileage than my swapped e30 - this doesnt make any sense. I read that other thread about gas mileage on these swaps and mine falls into the category of everyone else I guess, but why? Its a more power engine in a light body. It should in theory be getting us about 28 up right?

[giantkeeper]

I get about 21 mpg but I drive like an asshole....

[ck_taft325is]

My s50 gives me about 310 miles when the low fuel light comes on. I am sorry but that sounds rediculous. My e36 m3 gets better mileage than my swapped e30 - this doesnt make any sense. I read that other thread about gas mileage on these swaps and mine falls into the category of everyone else I guess, but why? Its a more power engine in a light body. It should in theory be getting us about 28 up right?

I get 27.8 all day long almost no matter how I drive my S50/ZF/S2.93.

IIRC the E36 M3 has a bigger gas tank? I'm not 100% on this but, that would account for a few miles. 310 miles isn't bad. In my '86 with the S50 I'm filling up right around 300 miles.

[Justin B]

I get about 21 mpg but I drive like an asshole....

same here haha.. m52

[hwy84]

Miles per tank vs. miles per gallon...

Your e30 has a 14.5 gallon tank. Reserve light comes on with 1.7 gallons remaining.

So:

14.5 - 1.7 = 12.8 Gallons used

310 Miles / 12.8 gallons used = 24.21875 miles per gallon.

The E36 M3 has a 17.1 gallon tank. Are you using the right math?


I've had an S50 M3, an S52 M3, and an S52 M coupe - on average I got about 21-22 MPG out of them all.

Haven't finished my S50 swap yet, but my M20 gets 19.2 MPG on average. My E39 540i gets closer to 18. More like 12 if I spend the day in the mountains. I'd say you are doing fine.

...Apparently I too drive like an asshole. :)

[MaksV]

is the problem range or milage. the e30 has a 14G tank right? so a little over 300 sounds about right for city driving. Should be between 21-24 realistically. Go for a 70mph cruise on the HW and see how far you get.

[bmwstephen]

he has a late model e30 which has a 16.5 gallon tank

[M-technik-3]

I get 27 in My e36 M3 highway I fill at 13.5 gallons. 365 miles a tank roughly. I tend to get the same with E30 depending on how much I'm in the fun pedal.

[Gnarles]

I average about 23 mpg with my s52.

[dude8383]

Wow, I wish I got that kind of mileage in my stroked m50 around town. I barely hit 230 miles on the tank. Hopefully my S52 will get a bit better mileage.

Having said that, I get around 300 miles if its all highway.

[bloodshot-e30]

weird im lucky to get 200 miles to a tank... but i have 4.10s and a heavy foot lol

[hwy84]

he has a late model e30 which has a 16.5 gallon tank

Well, damn. There goes my math. Heh.

[Aptyp]

I thought, only 88's had a bigger tank and all others had 12.8 tanks. I know my light comes on and I fill-up only with 11.5 gallons. When I ran out of fuel, I put in 13.1.


Either way, here's your math. E36 m3 has a 3.15 or 3.23 LSD and your e30 most likely has a 3.73. Do the math.

[graphikg]

he has a late model e30 which has a 16.5 gallon tank

True dat

I get 27 in My e36 M3 highway I fill at 13.5 gallons. 365 miles a tank roughly. I tend to get the same with E30 depending on how much I'm in the fun pedal.

how?

[bloodshot-e30]

weird ive never had an E30 with a bigger tank than 14 gal plus the bently says its a 14 gal tank.

the most gas ive ever put in mine was 13.3 gal tho