E30 Gas Mileage - BMW Forum

iamcreepingdeath · 06-12-2008, 04:32 PM

Ok i keep getting different answers from everybody about this, and i want to figure this out once and for all, officially:

What is the city/highway mileage of the E30 318 and 325?

I have had people tell me such vastly different numbers, and i need to get this straight (as i am looking to buy an E30)

thanks guys!!!

witeshark · 06-12-2008, 04:38 PM

The E30 325i gets about 17 in city/light urban. It gets about 26 maybe 27 on open highway (at reasonable speeds). The 318is should manage 23 ~ 24 city and over 30 on the highway (estimated)

Nick_318is · 06-12-2008, 05:47 PM

My 318is gets 25mpg in mixed city/highway driving like I stole the car (gotta rev the m42 to have any fun). Highway 30mpg is easy, and if you do it right 35mgp isn't too hard to get to.

iamcreepingdeath · 06-12-2008, 08:06 PM

awesome thanks guys!

so
325: 17/26 city/hwy
318: 23/32 city/hwy (maybe?)

Celsdogg · 06-12-2008, 08:26 PM

^^^ the 325i numbers sound about right to me. in combined driving, i get between 20 to 23 mpg.

yammahamma · 06-12-2008, 08:38 PM

yup my 325i gets 18-19ish city....and 25's highway...

Nick_318is · 06-12-2008, 09:51 PM

the 318 with the m42 i would say 25/30 easy and probably more like 25/32-33 up to 35.

I think the m10 318s get pretty good numbers as well.

ss325 · 06-12-2008, 09:52 PM

thats not very good mileage... just buy an e46

iamcreepingdeath · 06-12-2008, 11:34 PM

i know i am beginning to think that. I had originally thought the E30 325 gets better gas mileage than the E36 325 but i guess i was wrong. I need something with good gas mileage (i commute) and i want a BMW. (and relatively cheap). It sounds like i may be going for an E30 318.

If you slapped a turbo on a 318 would it increase the gas mileage on the highway?

witeshark · 06-12-2008, 11:50 PM

Quote:

Originally Posted by iamcreepingdeath

If you slapped a turbo on a 318 would it increase the gas mileage on the highway?

No, and if you use the turbo, mileage will take a cliff dive

iamcreepingdeath · 06-13-2008, 02:20 PM

really? how so? don't turbos increase mileage? (VW Jetta TDI, Saab turbo, any semi truck)

i know under heavy acceleration a turbo will increase power, and gas mileage will be terrible, but at highway cruising speeds, doesn't a turbo improve gas mileage?

bimmerguy82 · 06-14-2008, 08:04 AM

Quote:

Originally Posted by iamcreepingdeath

really? how so? don't turbos increase mileage? (VW Jetta TDI, Saab turbo, any semi truck)

i know under heavy acceleration a turbo will increase power, and gas mileage will be terrible, but at highway cruising speeds, doesn't a turbo improve gas mileage?

Well, I'm pretty sure a semi truck DOESN'T get good mpg. And a turbo diesel is way different then a turbo gas car.

denyo77 · 06-14-2008, 09:13 AM

between 22 US MPG and 25 US MPG

MEDSTUDENT87 · 06-14-2008, 09:31 AM

Yes a turbo vastly improves the performance and fuel milage of diesel engines but in gasoline a turbo often hurts fuel milage figures.

denyo77 · 06-14-2008, 02:40 PM

well except Veedubyahs Golf GT eingine - the TFSI which has a turbo and a supercharger as well as direct fuel injection, getting 170 hp out of 1.4 liter and an average MPG of 40-50