My mileage sucks when I go offroading. Using 4lo really sucks down the gas and low speeds will do that also. I usally get 16 normally and 12-13 when romping or when I go wood cutting. All the 4x4's I had got worse gas milage 4wheeling then on the paved roads.

Blacktero: 90 Montero Lwb V6 RS Model. 16" Toyota Alloy Rims, Dual Bouncy's; Gen II Front Rotors & Calipers; Rear LSD

Sraider: 87 Raider 2.6 base. Work yet to be done.