Join Date: Mar 2000
Location: Colorado Springs, CO USA
Feedback Score: 0 reviews
I have regularly gotten 20mpg at 70mph in Colorado. As 444 mentioned, it drops quickly at higher speeds. I have never gotten 20mph at lower elevations (trips to Texas, California, etc.) so I know wind resistance plays a large part. My typical highway trip in Colorado is at 5000-7000 feet above sea level. Thin air helps a lot. I hand calculate and buy my fuel from Valero or Shell. Other brand fuels available locally burn noisy and produce less mpg.
My highway fuel economy dropped by at least 2mpg after I put a tall topper (camper shell) on the truck.
Former Ford sensor engineer, 1991-1999
2000 F-350 CC Lariat PSD 4x4, AIS, AIC, BTM, Isspro EV2 gages, manual TC lockup, manual EBPV control, GPR LED monitor, DP-Tuner F6 with Drive-Thru, 60tow, Decel, 60econo, 80econo, 168k miles
1975 FJ-40 Land Cruiser, 350TBI, Muncie 465 trans, ARBs, York on-board air, 4-link rear suspension, Blazer tilt column, Mazda sport buckets, full roll cage, towed on 18' Big Tex trailer
1975 Denver Broncos Special Edition Ford Bronco