9.1 mpg!

I don't think he is lieing I've run 78,500 miles on a t660 and am averaging 7.2 and I'm just peddle to the governor not giving a flying ####. Terrain obviously plays a role but if I go from truck to Qualcomm it might be worse. Today I actually "tried" for good fuel economy and Qualcomm said 8.5 truck was 7.2 don't think that's going to change by the time I was done the Qualcomm said 7.8 so give or take it sounds about right. I will say tho that I think the sweet spot is just below 62 and keep the Rpms at 13 I'll try it possibly but my next load is 44,500 so don't think that's going to matter really.

 

We run at gross weight all the time. Then deadhead back to the rack. Most of our trucks average 6.2. Unless I do a lot of local runs then it's in the 4s

 

First liar doesn't stand a chance. I once got 17 gooing from Amarillo to OKC with a bobtail and a 60-70 MPH tailwind. Then I hooked on a loaded bullwagon and went back and averaged .03 MPG. Ha! beat that.

 

Every truck and it's computer are gonna be inaccurate. The Only way to know true mpg is by topping off the tanks (to bottom of the tank's filler neck every time) and calculating miles run from top-off to top-off. I'm meticulous about tracking my mpg for the last 20 yrs. My last one, '09 volvo, cummins, 13 spd, computer was always off by 2-3 mpg vs. top-off calculations, had an apu, it avg. 6.7 mpg which included idling. Prior to that I had w900L, cat 550, 18 spd, always got 5.3 mpg fast or slow didn't matter much. My new freightshaker, computer is pretty close sometimes, but it also varies from 0.2-0.8 mpg vs. top-offs.

New truck is '15 evolution, for all miles to date I'm averaging 8.542 mpg with minimal idling, calculated off fuel top-offs, not by the computer. If I subtract the idling time the figure is 8.794 mpg, run cross country, cruise usually set at 58-62 mph, pull a reefer with 50% time dry freight, trlr has side skirts, I have Airtabs on trk & trlr, Ecoflap aero mudflaps on both too, avg gross wt. is 60k-80k lbs. (I did have 2 lite loads in there, a 12k and a 25k load, but usual load in box is 38-44k).

The mpg should improve as it breaks in. Truck has dd 455 hp, dd12 auto trans with e-coast function on downgrades, rr diff. ratio is 2.62 or 2.64 I forget, running rear duals not super singles, and not a tag axle. There is that guy Henry Albert, he blogs at www.teamrunsmart.com, who is getting an honest 9.67 mpg, calc. off fuel top-off's, running with the rr sgl's and the tag axle setup. I bought mine off the dealer lot, or I probably would've ordered the tag axle. I don't like the idea of sgl's tho, always see guys broke down waiting for the tire guy to show up.

 

A similar thread...

http://www.thetruckersreport.com/tr...wheelers-/155448-9-mpg-class-8-5-axel-36.html

 

I making millions

 

Nice thing about the computer read out is it should be consistent high or low so you have a good gauge how a trip is going. Mine was always low vs manual.

 

You must be spewing fuel everywhere trying to figure out where to mount extra tanks to catch all the production.

 

it only took industry 14_years of screwing the middle year trucks to get that mpg.

 

Yeah, once a person has the difference between computer readout and actual mpg, they can judge what they are actually getting when looking at the display going down the road. That is one thing I like about the ScanGauge I have on my dash. It reads the ECM, but I have it calibrated to reflect what the actual mpg is. It is usually within a gallon to two of saying how much fuel I used when I fill up.