ok so its been awhile since i have driven my truck, new baby and getting married and such, but i used to commute about 1000 miles a week, and then go play on weekends, hauling my jeep, now i know when i was loaded i would get as little as 12-14mpg, but just highway driving, i would average about 18-20 depending on traffic, i have been looking at another truck to buy, with all of the same basic features as mine, but it has a banks turbo, instead of the one i have, and my truck has a 45 gallon rear tank(it was a wallet thief when diesel was almost $5.50gal) and the owner says his truck only gets 12-13mpg unloaded

So i am wondering two things, whats your mileage on average?

and would there be that big of a mpg differance between turbos?

 

dually gets 14 town, 18 highway, 10-12 towing.

86 did get 16 town, 20+ highway.

 

I had my 85 to 24 once or twice on the highway. Towing my International 1066 I get about 13-15.

 

my truck is stock other than 4" straight pipe into 6" dual stacks with the pump turned up 3/8 of a turn and the pump timing advanced 1/16 of an inch. to me thats a good place to leave it. you have the perfect amount of smoke and power for an idi. at this setting i get anywheres from 10-13 MPG. For me that is not much different from when it was stock.

 

you need help if thats all your getting. that rig shoudl get 15 plus. the mileage you posted would be standard towing mileage.

 

when it was warmer out (live in SE Wisconsin) i was gettin 18-20...with the colder weather lately gettin 15-16ish...better than my old 89 f150 that got 10 on a good day

 

ya i aint possitive i do need to check it next time though ill let ya know after i check it

 

I have had mine fir a month 7.3 IDI non turbo. 15 city and 16-19 hwy payload 0-2000 pounds

 

im getting 15-18 average and 13 with a cord of wood in the bed

 

I have a 85 f250 6.9 srw flatbed 4 speed with 3.75s with 3 in straight y-pipe back to a 5 in tip with k&N filter every time I checked I got 15.6 mixed driving. Anyways to improve mileage or do I need a 5 speed?