Updated Fuel Mileage Record-9.1 mpg

[Chamberpains]

Another thing to keep yourself from getting discouraged is to do the math. On a 500 mile day at $3 a gallon the difference between 6.5mpg and 6.6 mpg is 1.1 gallons.
Not much. But take that out a
5 day week.
5.5gal= $16.50
4 weeks
gal= $66
50 weeks or 1 year minus a 2 week vacation
350gal= $820
for just saving .1mpg

Now do the math for 6.5 up to 7mpg
5.5gal= $16.50 a day that just bought lunch everyday. And all you have to do is let the terrain and gravity work for you, when on a hill that you have to pull, drop the gear to get the rpm's up and keep your foot out of it.

When loaded and confronted with a hill in my cm870 with a 10 speed 3.55 rears. At 1350rpm and 60 mph I immediately drop 1 gear to 9th that takes me to 1675-1725 rpms and 56-57mph. Now I have to get into the peddle to about 70tps (throttle position sensor) that brings my boost somewhere near 20 psi but that keeps me from sluffing off to much speed. Then i immediately start easing off the pedal to get the boost as low as possible till i hit 1250-1300 rpm's again then its grab 8th and repeat then 7th and so on till im over the hill. Once i get to the crest and theres a down hill its out of gear to get free speed or very light throttle if the down hill isnt that great and if there's no down hill then im back in the throttle but very gently and never going above 20 psi boost to get back up to highway speed.
I guarantee I can drive my truck up any mountain in America and never use more than 70% of my pedal and I have it set at 450 hp. I also think i would use a lot less TPS if i had something newer. The CM870 with the air actuator doesn't have the throttle response like the newer ones.