I see on here alot of people saying their getting 20+ miles per gal. with their 6.7, what do you do to get these numbers? Never get over 63mph, run the skinney little stock tires? I would like to know how you get so much better milage than I can. At times I guess I might have gotten 20 mpg, but as an average it's more like 17-17.5 All my smog stuff is gone except the cooler

 

First, don't believe everything you read on the internet.
Tires are indeed a big factor. Biggest factor is wind resistance. If you go faster than 50 mph wind resistance increases per square.
Second every accessory mounted on the truck causes drag. You have huge towing mirrows? Fold them in.
Tonneau cover missing? Cover your bed or remove the lid.
Increase tire pressure but do not go overexcited by it- Too much pressure and you loose grip and you will increase tire wear with bulging the tires.
Even an open window causes significant drag.
Switch off the A/C.
Avoid accellerating- keep a steady pace. Avoid full stops. the list to increase effi is nearly endless, but never neglect safety to save some drops of fuel.

 

don't believe everything you read on the internet...is the main one I think

 

Lie about 4mpg or so.

 

mine meter is within a mile

 

I can get 20 if I try but there is no fun in thatdrive it like you stole it and remeber to put fuel in ,they are too heavy to push

 

Tony, you ridge runners are probaly allways running down hill

 

A lot of people stretch it, but mileage has tons to do with how you drive it. I don't have a 6.7 anymore, but I did get a solid 20 when I did have one with a blackmaxx. Just about anyone would say I drive very slow and easy though.

 

10 ply toyo tires inflated to 60 lbs running nitrogen, very little weight in the tool box, no hills, slight turbo intake boost, HS Black Maxx set to Mild setting, no wind and good wax job I got 20 mpg going from Salt Lake to Grand Jct on I 70 once! no BS, 17 is about the best if I forget about the big ole blue silver and black display meter on the column staring me in the face over my steering wheel. Uh yeah that could happen, it's beats the livin HELL out of 9-11 that used to get and if I keep from going airborne and avoid the cops its a lot more fun. BTW that's better mileage than an old Toyota Tacoma I had got!!! and a lot more fun that driving a battery powered save the planet and **** people off mobile. {prelude}

 

i run the stock 265 tires and have 3.73 gears. this seem to be the combo for mpgs.