fuel prices at 3.259 per gallon
I just filled up today from a 251 mile trip. Normally I get 18+ at 2000 rpm, but this trip I kept it at 80 mph for a test. I got 17.24 mpg. The best way to check your mileage is to run a couple hundred miles and then divide the gallons used into the miles driven. Example 251.1 miles driven 14.559 gallons used= 17.24 mpg. By driving at 80 mph, instead of 70 mph, I lost 1.5 mpg because normally I get 18.5 to 18.8 mpg at 70 mph empty. I would like to test the mpg at 60 mph, but in my area, 60 mph will get you killed. Also, the rpms at 60 mph will be around 1714, which might lug the engine. Every direction except south is up hill.
Going south at 60 mph will get you run over by the big rigs in the slow lane.
So maybe one of you guys in the midwest and flat (Texas) could make that test.
You guys that are getting 20+ miles per gallon, that is great....
I've heard that some of the 7.3 Fords are getting 20+, but us 6.0 Fords are getting around 18 mpg.