fuel mileage
 

im seventeen years old, and a few months ago went and bought a 93 cummins 250. my dad owns two second gens, the oldest being a 99, so they both get pretty good mileage, even after the big o injectors he had put in. he spends alot of time on here, and he has a pretty well general knowldege of dodge, but not enough lol my grandpa owned a 93 cummins, nearly the exact same as mine, and i fell in love with his truck. he passed away (God rest his soul) and now that i have mine i have no one to ask questions about mine. i got it in the fall, and it got roughly 18 mpg. i have no good ideas as to how to get better mileage, and would love some tips. seeing how im on a budget (working at a warehouse, getting 9.25 an hour when im not laid off in the winter) cost friendly ways are preferable. i appreciate anything i get back

drive as slowly as is safe. save your pennies for a good torque converter. keep stock tire size.

ya do not change the tire size keep it stock is the pump turned up at all if it is turn it back down there isnt much you can do to get better milage except messing with the tranny and the pump i have ben told bumping the timing helps get a mpg or two but not positive

Keep you fuel and air filters clean and keep your right foot light.

Bumping the timing isnt a bad idea either.

Welcome Jon! If you can't find the answers you're looking for on this website, the questions ain't worth answering! Yep, a timing bump will give you an extra mpg or two, as well as make the truck a little more peppy, (see the sticky for instructions.) As the others have mentioned, a good torque converter is a wonderful thing, but not exactly cheap for a good one. Keeping the correct tire pressure is cheap, and that will help. But really, your right foot has the biggest impact on how much fuel you're going to burn. 18mpg's is pretty damned good for an auto. My best run was 18.6 a couple of months ago, doing 60-65 mph constantly. Around town I usually get 14.5 - 15, although I've bombed my pump a little and got bigger injectors. I need more air to get better numbers. Stock, I was getting 17 around town, so bigger and more isn't necessarily better, from an economy point of view! [laugh]
Anyway, reading all you can about how and what and why is a good thing. I'm sorry about your grandfather, but at least he left you with a love of 1st gen's! Good luck!

18 mpg is about normal for that truck. My 91.5 gets 16 - 17 in town & 18 - 19 on the highway. Both running empty and driven normally (no lead foot & no egg under my foot)

I get about 19 mpg pretty dependably. Have gotten 21 pretending there's an egg between my right foot and the gas pedal and max speed of 60. Tires are aired up to the max at 80 PSI.
I get about 13 with a load and the 5th wheel in tow... HTH, H.

just as i feared. not much to do. the pump isnt touched, and a revered cummins mechanic (jim jessup) said my pump was in INCREDIBLE shape. so thats a plus. but i feel pretty proud about keepin my foot out of it. the cold doesnt help any lol
dad wont ever let me get bigger tires as long as his name is on the title as partial owner and im under his roof
i appreciate the input. i have a feeling ill be on here alot askin questions to guys who own a twelve valve. ive never been a big gear head, but im tryin haha