winkdemon

i am thinking of buying a 1998.5 cummins witha 5spd 3/4ton 4x4 . what i will be runnning 500miles a day and i want to know the best i can get for mileage ... the price of fuel these days feels like i am throwing money away

georgboy

What gear ratio?

georgboy

Your best bet would be to get a two wheel drive vs. 4x4,unless you really need it.

Darren5531

Very top mileage assuming that you are driving in the mid 60's mph wise, I would say would be in the low 20's. Slower you go the less fuel you use but time is money in some cases. If you don't need a truck just wanting a truck but needing to drive 500 miles a day. I would look into getting a tdi jetta basically use 10 gallons vs 23ish.

2wd 24v bump up timing using a programmer, highway tires with max psi, and you can do some research regarding some other things that can possibly increase mileage. 2 stroke oil in every tank as well.

Best of luck, it is a buyers market right now.

winkdemon

its has 3.54's and it has a265 for tire . i need the 4wheel for the winters ... i am going to buy a jetta later on , so when its a small part i can use it

Cjaiceman

Going from Denver to Grand Junction and back (about 500 miles round trip) I averaged 24.7 mpg (math, not computer). I have 4.10 gears on 33" tires, and I was empty the whole way, but I was doing 75 mph. This was also through the rocky mountains.

On my trip to salt lake city from denver (went through Wyoming) I got about 24.2 mpg, and made it on one tank. I was pretty empty when I got there though

sheriffav8r

Holy Schneike, Batman! I would've guessed in the low 20's, but over 24mpg doing 75 is unbelievable! Especially with 4.10 gears and 33" tires in the mountains.... SLC to DEN is about 535 miles on Mapquest and should've only taken 22 gallons or a little over 5/8 of a tank at 24.2 mpg. Low fuel light or 30 gallons(ish) used should have propelled you over 700 miles.... Just curious....

Cjaiceman

I was coming from Parker, which is on the south east side of the Denver metro area, and going to the south end of salt lake city. I had about just over 1/4 tank left when I got there. I also have the 34 gallon tank because its a short bed, not the 36 gallon tank like in the long bed.

Note, I consider 1/4 tank as empty. I don't like going under that as sometimes Diesel can't be found at some stations. Plus, I don't like the thought of having to bleed the fuel system...

johnh

here we go with another mileage discussion
i get around 20

DIESELDENT

22mpg with the 98.5 driving around 60 all day. my uncles truck is a stick with stock tires and a 5'' exhaust, 3.55 rear and gets a 26 if he takes it easy, he got 29 on a long trip down 95 but he drives the speed limit.

sheriffav8r

I just gotta coast some more. Maybe a big electromagnet on the front to attach myself to a semi now and again....

winkdemon

i ran a 93 and i get 24 all day long BUT it rides like a hay wagon lol, so never i will buy

cLAYH

<sigh> I only get 14-15mpg on my '01 3500 4X4 dually.

Not sure why its so low. 4x4 dually definitely doesn't help, as does the auto. If I put the edge on milage and drive easy I'll get almost 15mpg, on setting 4 and a heavy foot it goes down to 13mpg. This is city/highway, my commute is about 100km round trip.

I know that fuel isn't as good up here as what you guys get. Last year I went to Utah and got better milage towing 7000# than I do empty here.

My '92 with a upgraded TC, timing bump, 12cm housing and minor pump mods got 16-18mpg, slightly better than when it was stock.

dieselfan

with 100hp jammers, stock turbo and smarty i could get 20-21.4 mpg driving 80-85mph strictly hwy though.

i cant drive 75.

in town 13-18, depending how i drive

im a 2wd on 265's

winkdemon

what can i do to the truck to get better mileage ???? its stock other then it has a hot rod vp pump .....