2008 dodge ram 1500 QC Hemi with the stock 275 60 20 I got 11.5-14 depends on how I drove but I normally drive pretty slow to save gas and 15-18 on the highway.

But now I just put on 35 12.50 20 and im getting like 10.8-11.5 and thats driving pretty conservative and havent had them long enough to drive it down the highway so idk what that will be Ill let you know.

 

Im runnnin 285/70/17 as opposed to stock which is 245/70/17, Will this make that big of a difference??. Also I was wondering if it is normal to floor the accelertor (in park) and have it almost be governed at 4000 rpm?? Meaing it wont rev past 4000rpm.

 

Not sure what my problem is but im running an 04 1500 4.7 v8 Upgraded the tires to 295/70/17 and getting only 10/mpg.. Started a few yrs ago at 14.4 then dropped to 8.5 now back up to 10. Working the kinks!

 

03 with the 4.7l 4x4 quad cab. Was getting 11.8 now getting 13.0.

Changed my oil from 5w20(dealer used) to 10w30 synthetic blend gained .4 mpg. K7n stock replacment filter gained .8 mpg.

 

i think thats fine, when in "N" i revved it and it seemed to slow down at around 3800. i just let off and didt take it too 4k but i bet it is governed. i was wondering the same thing lol. good to know someone else had the same thing happen to them.

 

2003 Dodge Ram 2500 HEMI lifted 4 inches magna flow exhaust 35's. 10.7 city----15.5 Highway

 

I just took my beast up to Georgia for a long weekend. 15.9 on the 360 mile trip up - about 1/2 interstate, 1/2 two and four lane roads with lights in every town I went through.
14.8 coming back with a 700 lb. ATV in the bed and a good 300 or so pounds of stuff in the back of the cab I didn't have going up. I don't think that's too bad for a 7000 lb. truck with 4" of lift, 35" tires and a good many power mods...

 

on a stock tune it governs your revs to 4k... that was one of the most exciting things when i got my superchips programmer lol. now people knew i was trying to drag race hahaha

 

haha yeah, im gonna have to get one of those soon, i hear theyre pretty kick ***. and Hammer, i have been using star-tron in my last 4 or so tanks, i think i got about 1 mpg better than i did but it does seem to run a bit smoother. thanks for the tip!

 

05 3500 4x4 CTD!! on 35s and 4:11 Gears and far from stock,
best highway no load 24-26, city/highway with the lead foot 18/21
and highway loaded down with 26K+ pounds worst i have ever gotten is 16MPG