Horrible gas mileage!!!

[KenC]

I was doing 20-25 mpg with 4.10 diff and since I changed to a 3.73 lsd I get 40-45. I don't know why and don't really care xD. My old diff was squealing though I think it was burnt.

You're running REALLY lean if you're getting 40+ MPG. Something is wrong with your mixture, math, or odometer.

[e30BMart]

I need to drive like an idiot to only get 200 miles. City driving does take more gas though so it depends on you guys habits.

[keada714]

this is the kind of miles I would love to be getting.. I will have to get a hold of a 3.75 small case diff. Going to install the "newer afm with cone filter. Hows the coil on plug?? I had some in my old car and i really didn't see the difference beside lasting a very long time..

im pulling 350 miles per tank before the light comes on on every thank 3.73 diff cop kit clean filters backroad driving all new timing components. 200 is shitty

[bmwm42]

im pulling 350 miles per tank before the light comes on on every thank 3.73 diff cop kit clean filters backroad driving all new timing components. 200 is shitty

[Ryann]

Pull your spark plugs and tell us what you see/post pics.

[keada714]

I gas up every week and honestly I do less than 200 miles.. its getting me bugged and ready to sell the darn thing.. getting another afm and installed new coolant sensor is already install...

[e30BMart]

I know! I was happy to realize I can last two weeks now before gassing.. But I usually gas every 100k just because it seems like you spend less.

[grippymonkey]

Best of luck getting your M42 running right. These cars can get very good MPG's when maintained correctly.

I drove up from LA to SF last weekend. I average 33mpg's on a stock 318is with an intake. I would imagen once I get the car sitting lower (not cutting through the air like a 4x4) and lighten it a little I could get 35mpgs. Hopefully an exhaust will free up a little mileage also. Not sure if the intake helped MPG's or not (I would hope so, but I didn't test it before install) but it definitely helped a little power wise. I had to shift back and forth between 4th and 5th pulling the first stretch of the grapevine on i5 on my trip a few weeks ago without the intake. With the intake on I was able to pull the entire stretch of the grapevine in 5th gear. I was pretty surprised.

[Simon S]

Krikies !
40-45 is some spankin mpg for an m42. Wow. (you talkin kpg?)(kpl?)

Shit - seems like i've read 3.73 diffs on m42 cars resulted in only marginal/negligible differences in fuel consumption – and even then, only detectable with distance/highway driving.

A ~20 mpg decrease in consumption from a diff swap is quite remarkable. Jesus.

[e30BMart]

I was doing 20-25 mpg with 4.10 diff and since I changed to a 3.73 lsd I get 40-45. I don't know why and don't really care xD. My old diff was squealing though I think it was burnt.

[immajackuup]

Thanks! Shall get some asap!

im stillmatick

http://m42club.com/forums/showthread.php?t=233&page=12

[keada714]

Thanks! Shall get some asap!

[immajackuup]

did you use the 0280150556 injectors? the thread is a little confusing..

yes,these is where i bought my mustang injectors at.

http://www.fuelinjector.citymaker.com/catalog/item/4494564/4532416.htm

[b*saint]

So I just did a 480 mile round trip today. Car was fully loaded with work tools and my suitcase. The trip one way: 1 hour stop and go (30 mins at the beginning and end through the cities.) 3 hours @ 70 mph. .5 hour highway parking lot. M44 with 238k, AT, and no AC. I averaged 31.889 mpg.

[keada714]

did you use the 0280150556 injectors? the thread is a little confusing..