I think he meant 6 mpg, not 60. Jeep + V8 + trail gearing = single-digit mpg.
I thought about that....but thats awfully low. Had a bunch of Wranglers both 4 and 6s. All had varying levels of trail upgrades, none below 10MPG. Heck my 1999 10 lifted full size 2500 Suburban with a 454 got 12MPG.