THE ULTIMATE FUEL MILEAGE THREAD

[KRB64]

I write my fuel stops in a logbook. When I fill up I note the mileage and how many gallons. By doing this I can average fuel mileages for months or years, all I have to do is add up the miles and the gallons used for that time period and divide it out to get my mileage.

Thats what I do but my speedo is off by 5mph so my mileage is off a liitle too. I'm going slower than what it says, so that means I'm not traveling as far which means my mileage is actually a little worse than what i calculate.

[RumbleFish]

I practically never check mileage, but here is the few times I have.

#1 D250, manual, 3.54, 235/85/16's, stock injectors, virgin pump (yeah, it's a dually now, but haven't checked the mileage since the conversion)

18 mpg on summer fuel around town
21 mpg on winter fuel heading south of Indy to pick up a turbo kit for my old neon. Ran 75-80 mph most of the way.
23 mpg on summer fuel going to Tire Rack in South Bend to pick up slicks for autocrossing. Ran 70-75 most of the way.

[dpuckett]

Mine- #6- 17mpg city(<45mph 90% of the time, hardly gets warmed up); 19-21hwy. 92 D350 Xcab, steel flatbed, 3.54

Mom's #6a- 15mpg city; 17-18hwy. It just got a refresh on pump and injectors, so it hopefully will improve. 92 D350 xcab, p/u bed, 3.54

Daniel

[Bluebird]

#5a: From 32-fuel stops, the average fuel mileage calculated is 20.05mpg. I use Power Service fuel treatment approximately every 50-gallons used. See my signature for speed and truck mileage.

[Dean]

I was just going to ask what you guys with DRW's get for fuel mileage and I saw this post.

When my truck was a SRW I got averaged about 19-21 mpg. Now that I have converted it to a DRW, the only time I checked it I got about 13 mpg. I noticed that my fuel mileage when way down when I made it a DRW but I didn't think it would be that bad.

Dean

[JLeonard]

I'm a number 1

Best I got was 25 + (on several occasions I might add).
Typical in summer 22/23
Typical in winter 20/21