Fuel Mileage?

My 4.0 will get 24 if I keep my foot out of it.
904 with 3.08 gear

Where's the 14 and below? LOL

metoo, not enough categories.

my 63 American, 195.6 OHV with Weber and "RV" cam, T-96+OD, consistently gets 23-24 long term average worst case, 25 mpg if i keep my foot out of it. I'm going to make another pass through jetting (it's close, but i have a flat spot) and recheck.

The 232 with GM EFI on it got 20 mpg, in a 63 Classic wagon with a Flashomatic.

I could never get my 70 Hornet better than 18. Very frustrating. 258ci, same Weber (32/36), "RV" cam, Torqueflite, I forget the axle but it was typical factory mileage job. Ran great and fast as heck just lousy mileage.

tomj wrote: metoo, not enough categories. my 63 American, 195.6 OHV with Weber and "RV" cam, T-96+OD, consistently gets 23-24 long term average worst case, 25 mpg if i keep my foot out of it. I'm going to make another pass through jetting (it's close, but i have a flat spot) and recheck. The 232 with GM EFI on it got 20 mpg, in a 63 Classic wagon with a Flashomatic. I could never get my 70 Hornet better than 18. Very frustrating. 258ci, same Weber (32/36), "RV" cam, Torqueflite, I forget the axle but it was typical factory mileage job. Ran great and fast as heck just lousy mileage.

Sounds about right - the bottom one is indeed a bit curious - I got 21-22 with my 68 and 232 stick. But I hear quite a few folks talk of low mileage with some of the 258s. Weber is a decent carb, too, for economy from what I gather. The TF transmission - I'll assume that's standard AMC issue mopar transmission, so no locking converter, no OD. You lose a lot of power through the 70s automatics.
Yes, they did run great and were pretty quick in their day, well, even now they aren't bad.
I had a 77 AMX with 258 and 4 speed, loaded, got decent mileage. Did very well in the mountains around Denver.

Doc I'm not sure being in Iowa what they do different in the fuels here - it's not like some zones where the fuel is so bloody complex from month to month, but can't say that they change nothing either. I've not researched that part for our state.
Again, I'm rather anxious to see how this does as it breaks in, and the weather gets nicer. I fully expect it to do pretty well when the temps are in the 50s and 60s and I get some more kinks worked out.
I also wonder about that 30 wt oil in the T5 - the transmission experts said absolutely, that's what the factory now recommends, straight 30 wt engine oil for a NWC T5, but she's really stiff in the winter - grinds a tad into 2nd and 3rd, 1st, 4th and 5th smooth as silk always, then after a long hard sustained highway drive when it's hot, it's hard to get out of gear to up-shift but goes nicely into the next gear! Go figure.
May need to reduce it a bit with a small dose of ATF.
I have synthetic gear lube in both differentials, and synthetic ATF in the transfer case.
doc - IMO, those figures are not terrible. Remember, alignment, tire pressure, DRIVER habits, etc. all play a role in fuel economy.



Edited by billd - Feb/27/2012 at 7:34am

How do i ad more ranges to the poll?im hoping to model my wagon after toms's,im thinking of puttin 2 inch exhaust.