I have a 2003 Ram 1500 that averages 18-18.5 mpg (on the overhead computer). I drive 52 miles round trip to work with 75% of that being highway. The truck has a flowmaster exhaust (gained 1.5 MPG), and a I run synthetic (gained 1.0 MPG)
Good luck!

 

18.5! i wish.. my overhead reads 11.2 i have flow masters and use mobile one synthetic too...

 

You only get 11.2 mpg on pump gas? That's on par with our company's 3/4 ton Chevy's with the 6.0L! That's bad gas mileage!

Tell the Hulk he needs to walk for awhile!

 

14.5 average in town. Thats the actual calculation, not the overhead one

 

lol

 

11.1 city Highway varies whether I'going with the wind or against it.

 

hey rey you did that sliding rear wondow custom or did you buy it like that...

 

Have driven 2000 miles in the first ten days, so I've had a chance to try out different conditions.

Overhead display seems to read 0.5-1.0 mpg higher than actual. The speedometer is accureate to within 1mph according to my GPS with stock 33" tires (275-60-20). Tried a flat, 20-mile stretch in 6th gear (no wind) with the cruise set at 55mph...overhead said 18.9mpg, so I was getting 18-18.5 actual mpg.

Is the stock exhaust so restrictive that a muffler or catback upgrade can yield 1+mpg increase?

 

ive gotten as high up as 25 1/2 on the highway @ about 65. im doing everything i can to squeeze gas milage out. next step is some pulleys and gears.

 

This just in...

The overall average for our truck for it's 2500 mile life is now at 15.8 mpg! At least according to the overhead readout.