Well I thought I would post my Fuel mileage. I drive a 8% grade each day and do mix of highway and city driving. I calculated my mileage out for this tank and came up with 10.4 MPG. I have tried to keep my foot out of the throttle and travel about 45MPH with the big rigs on the grade. So I thought I will just post some real world findings if any one is interested

 

Don't want to highjack the thread, but I have a 1995 7.5, E40D with 3.55. I've been driving it back and forth from home to college and into town for work during the week since late October, so it's all really cold weather, quite a bit of warm up time, and short 2 mile trips from the dorms to my job. I've driven interstate, backroads, and town driving which accounts for the different mileages. But here's a list of what I've averaged.

10.15
10.51
12.11
9.43
11.34
15.78
6.50
11.49
8.29
10.01
8.31
9.94
8.26
15.75

Overall Average = 10.37

 

Funny.... my small block 351w gets worse than a big block. Guess thats what i get for 4.10 gears and a C6 for a daily driver