2007 2500 6.7 auto slt quad cab heavy duty 4x4 sb pull 24' x 8.5 enclosed with approx 9k total weight from CT to NV and back, got 12.81 mpg stock on way to NV but only 10 mpg on way back with Max energy on stage one. Better throttle response and pwr but not so good mileage. Could be diff in atltitude bc I 40 on way to NV and I 70 on way back thru Denver and Rocky MTs. Will try stage two as recommended by someone with similar set up on way to NV this coming Oct.
3 weeks ago I made a run from western Colorado to Boise. 25' homemade enclosed approx 6K empty and I was about 12K loaded on the way back. 11.5mpg on the way to ID and 10.2mpg on the way back. I ran the interstate the whole way running right at 75mph both ways.
Looking at my cat scale sheet now,
Steer Axle 5100 lbs
Drive Axle 7160 lbs
Trailer Axle 8820 lbs
Gross weight is 21,080 lbs.
I have logged 27,000 miles with this setup and never get better than 11.3, driving into wind and tracking hills will drop into the 8's. This is traveling from West Tn to Massachusets every week. 36' enclosed triple axle car hauler.
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