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WTF? Better MPG's in the Hills than flat??
I don't post too much, but thought I'd ask. . . why would I get better mileage driving through the mountains at 70mph than I would on flat ground at 65?? Hand calculated. . .16.4 in the mountains, 12.6 on the flats. Last week I took a road trip from northern CA to Yuma AZ, back to San Diego, then to Vegas, then back to northern CA.
Truck is an '03 with a 7.3. . .here's what's been done to the truck-
8"lift, 35" x 12.5 tires
Injectors- done before I purchased truck, I'm told a little bigger than stock
Tranny/TC/Valve body- new
Cold Air Intake- new
Turbo back exhaust- new
Turbo- Garret GTP38R- new
Up Pipes, Y Pipe, pedestal- new
Fuel Filter- replaced 4k miles ago
Edge set at 100
I would think mileage would be much better on flat ground, with a lower rpm, not working at all. On the last leg of the trip, I fueled up before the mountains and directly after, just to check mileage to see if I was an idiot. Anyone??