We completed the Altar Dune crossing, and the Discovery was a champ. The V8 was just enough power and the BFG ATs exceeded my expectations (especially at 12 psi). These were big dunes and over 40 miles long. In total, the trip was just shy of 1,000 miles. Adjusted for my gearing, my best tank was 17mpg and my worst was 10mpg. I never needed the spare fuel, although it was really close in the dunes.
Congratulations on the great trip. Happy you had a good time in the dunes.
I was wondering why you were so worried about the range of the car in the dunes. As you might expect we get a lot of dune driving here (well actually it is quite a drive to find something which is not covered with sand) and usually my RRC (3.9ltr) gives me easily 250 km/ 155 Miles offroad on the tank before the light comes on.
Did you guys had to cover a long stretch before or after entering the sand that you got tight on fuel?