My extra weight, wind resistance and tire keep me from breaking into 20 mpg I think.
I think guys are doing a little better mpg with the 261C.
I am VERY curious how this cam and engine performs, and I will put it on the dyno at my local speed shop, and I will record my gas mileage. We have wind here quite often and I drive from about 1,000 elevation to my home at about 1400 feet elevation, and I can feel the drag on the slow up hill climb for about 5 miles. If I'm bucking a headwind, I had to shift into 4th gear!
... which you have pointed out several times... bugs the crap out of me.
As I remember this truck is 3250 with a full tank of fuel and me sitting in it.... I'm 195 lbs.