Here is my mileage info so far. I have 6700 miles now. I drove 200 miles (60- 65 mph) 90% towing a 8000lb trailer or 3500lb trailer. My avg mileage on the computer read 11.2 ( after clearing it out when i filled up ). The manual figures came out to be 10.8mpg. I was dissapointed, but I know...