What type of MPG are you getting ?

[GeneseeMtn]

I have the factory rear Detroit locker (on the original sticker, it was an option for $138). Makes you wonder why they just didn't put them in all the trucks. It "clinks" into & out of lock by itself.

On the last now run, I ran with chains on the front tires in 4H most of the time - it was nice to have a little more momentum going up the steep, slick hills. I imagine the same is true on sand dunes.