Lately 16 with a lot of idle time. Glad to see warmer temps commin.

 

12valve
stock: 13/18 summer
7in lift with 37's: 14 combined winter

 

14 or 15 tops for me... To much idle time. The most i have ever seen in mine is 19.5. I suspect some injectors will help this.

 

Winter:13-15 combined.

Summer: 23 highway, 16-18 around town.
Im hoping the 5 speed swap, a set of injectors, pump work, and timing will give me a few more.

 

14 combined

 

Winter time has sucked!!! 12-15 mostly around town and where I get my fuel. If I use Sams Club fuel I get crappy mileage, my old girl just hates it! If I use BP fuel, lately driving combo miles, approx 17-18, hand calcs. If I can stay under 60 on the highway, I have had runs of @ 22 mpg in the summer. Always looking for more.

 

Hey 12Vdodge, 5 speed ain't gonna do much for you... I *can* get 18.2 on the highway doin 60 ish, but that's the BEST I've ever seen... I've also logged 12.2 pullin the gooseneck horse trailer... But, DD, it's all over the map.... Sometimes good, sometimes aweful....

Having 4.10's really sucks....

 

I get about 17. and that's doing a lot of idling in the morning and night to and from work. Mostly highway and I'm lowering my gears from 4.10 to 3.55 and see what that does with the 4k gsk

 

Eh....well one can hope. I can imagine the 4.10's really kill the highway fuel economy....

 

With my rig weighing in at close to 10 k I get between 16 and 20 highway depending on how heavy my boot is that day but I'm loaded all the time welding rigs ain't light the truck in my sign has seen 25 but only when its raining