Bad MPGs?

[phreshkid]

How are your injectors? What about cat? o2 sensor? I average about 290-300mpg a tank and I've gotten 330-340mpg on all-highway road trips. m52 w/ s50 cams, TRM tune, Castro's airbox, mostly stock everything else.

[treff-7]

How are your injectors? What about cat? o2 sensor? I average about 290-300mpg a tank and I've gotten 330-340mpg on all-highway road trips. m52 w/ s50 cams, TRM tune, Castro's airbox, mostly stock everything else.

dude! i wanna know your secret cuz those are some crazy numbers you got there!
mpg=miles per gallon. i guess you meant miles per tank.
i got my swap done 2 weeks ago and only emptied the tank once so far but i got 300 miles until the light came on on the dash. 50% city traffic, 50% highway with a couple pedal to the metal situations.
it is a e30 convertible with a OBD1 s52, stock 21.5 injectors, 3.5" MAF, KA Motor's 3.5" intake, TRM tune, Castro's custom exhaust with stock e36 M3 muffler, 2.93 differential.

[Danny]

How are your injectors? What about cat? o2 sensor? I average about 290-300mpg a tank and I've gotten 330-340mpg on all-highway road trips. m52 w/ s50 cams, TRM tune, Castro's airbox, mostly stock everything else.

Injectors are rebuilt as of a year ago. Cat is old. Like a year and a half old. Aftermarket cat. O2 sensor is as old as the cat.

[treff-7]

Since when do you have this bad mpg?
How hard do you drive the car? City/freeway ratio?

[quillbro]

hmm wierd... I have an s50 with zf trans, 2.93 diff.... I get 22 average from normal driving. about 20 average if im ripping around everywhere.

I thought it might be better... maybe a better tune? Im running the TRM EWS delete stock s50 chip. I want the engine healthy... ie: not running rich. But Im happy with my MPG.

And smiles per gallon are better than miles per gallon so whatever.