With mixed city and highway driving I get between 14-15mpg. If you try driving the least bit aggressively, as in making shifts at 3,000rpm or higher (thats not saying much, 4600lb car with a 4.0V8 w/183hp) it significantly decreases the gas mileage. You can basically watch the fuel gauge drop to empty.
According to the previous owner, he got 18-19mpg on the highway, I don't know if I believe that, but he seemeed to be a pretty honest person. My friends moms suburban with a 5.3L v8 and a similar weight to my car rides at 70mph at unded 2,000 rpm, mine rides at 3,000rpm.
Looking around, many Discovery owners seem to get 14 city, 14 highway, and 14 while towing.
Our Other Cars:
- Dad's Discovery 4.6 V8: 15ish pretty much all the time, sometimes as low as 13mpg though
- Mom's Touareg V8: 16-17 average highway
- Jeep Grand Cherokee V8- Averages 18 according to the computer
- Dad's 1998 Cutlass (commuter car) - 30mpg highway- thats all I know