Fuel economy
- Thread starter alfonso
- Start date
08_Superduty
New member
My 2008 6.4 dually gets 14mpg with out a trailer in both city and highway driving and 12 with a trailer (15,000 lbs). Bone stock
My 08 F350 SRW with 3.73s averages 15mpg on the highway, and 12 to 13mpg in the city. If I drive normal I can get 17.7. I bought my wife a 09 F250 with 3.55s and it got 18.5 stock at 70mph. All this is hand calculated. 5 inch flopro, aFe CAI, and minimax on the 08. Haven't check mpg on my F250 since putting the parts on.
ncollins64
Well-known member
08 350 srw with 3.73s. tuned and deleted and lifted. same truck in my sig. i can get 18 on highway and 13 in town if i drive right but thats sometimes hard to do. i havent got an average yet when im towing though.
I was getting your same mileage stock. Tuned and deleted and its better, but not as good ad it could be. I am shooting for mileage on my wifes 6.4. Happy with the power and speed, but I plan to see whstvthe best mileage I can squeeze out of it.
DGCstroker
New member
I was averaging 9 stock. 15 or so tuned and deleted. Spartan 250. And I lug around skid steers, mini excavators, lawn mowers, pavers, etc. most everyday.
08_Superduty
New member
I dont run any additives, and I forgot to mention I have 4:10 gears
BBottoms
New member
I avg 13.6 with my normal driving. If I run an all highway trip unloaded I can get ~16 at 75-80 mph. Best I've done towing is ~15 running 75 but that was just a car hauler with a crown vic, probably 6k lbs. Mods in sig and 3.73 gears. I almost always run Diesel Kleen, although mainly for peace of mind since it doesnt seem to help mpg much, if any.
VanoFord
New member
im averaging 15mpg combined. truck is 08 350 CCLB w/ 3.73's. i can get almost 18 if I just highway, but when I scoot around town more often, I get closer to 13.5. My truck is completely stock. Hopin to delete/tune in the next month or so.
