Extended cab (half suicide doors) auto 4x4 long bed no topper. 3.73 gear ratio 20-22 mpg consistent.

+1 mpg for any of the following generally. Topper/taneua. 2wd. 6 speed.

There's a guy on a hypermile board I follow who reports 36 actual mpg. 2wd ext cab 6 speed short bed custom topper and some skirting.

-30 is damned impressive clodhopper. My 7.3 and 300td were unable to start at -32 no matter how much I cycled the plugs.