On my truck.... 3.55 gears, 265/75 tires, I did a complete tuneup, fixed the plenum, (and modded the kegger, but, that has little effect on fuel economy), replaced timing chain and gears, and front O2 sensor, and went from about 8 mpg (and three quarts of oil per week...) to around 12 city, 16 highway. That's about as good as its gonna get.

 

12 mpg's in the city, that's amazing!

 

Keep in mind, that "city" is applied loosely to the place in which I live. Adrian is NOT a booming metropolis.

 

I have a 2001 Dodge ram 1500 Spot 5.9L 360 4x4 3.55 gears 9 1/4 rear and dana 44 front on LT265/75/16 E and i get 13.3 to 14.1 mpg in town.
no mods just reg tun ups and oil change every 3 to 5 months. transmission filter and fluid 2 or 3 time a year.

 

few things i read
changing ur oil.. 30 or 40 weight.. also i read synthetic is good
keeping the rpm's below 2k
and max speed 70 is good
on improving gas mileage
few others i cant remember atm

 

Go the down hill route.

 

I average 14.5 mpg in my 1996 5.9L...i dont drive it like a grandma, but i dont drive it like i stole it either, new bearings, rebuilt motor, good tune up and no "emmisions" crap and im pulling 14.5mpg, its not great but im happy concidering the truck is a 1996...still might pick up a more fuel efficent truck though...just keep the ol girl around for a real truck...lol

 

How is everyone getting 10+ city? I get 8.9-9.3 and 9.3 if I lay off the throttle. My plenum isnt broke yet; I check it every week. I have all my power(and more thanks to SCT ), I just replaced my air filter, I do need a tune up but its not effecting my gas that bad, only 1 mpg.


Granted the way I drive, its hard for me to keep off the throttle. Plus I have 33's(ya ya ya, I have 4.10s, big whoop. Tires are still heavy).


Granted I am getting pretty decent highway, like 13-14(averaging both mpg in OHC), but thats under 75 mph.

 

SIMPLE ANSWER SPEND 150 BUCKS BUY A HUFFY AND PARK IT. you lose weight get in shape and dont pay for gas. (mostly the wife will love it but all in all it sucks great big fat swetty nasty elaphent ***** gas where i life is not 4.20 a gallon. and for 25 gallons that 100 bucks. just to last 5 days f that

 

the best answer would be to get a prius