MPG

If you want to see even better fuel mileage, draft behind a Swift or Knight co. truck.

I try to do that almost every week on mt way to LA, but on the way home I'm usually balls to the wall.

 

Your numbers with Phoenix to Houston turn @ say 2352 miles: 415 gallons @ 71mph, 360 gallons @ 66mph, 318 gallons @ 62mph : 5.66mpg , 6.53mpg, and 7.39mpg.

If you take Cummings rule of thumb for 1mph increase over 55mph decreases efficiency by .1mpg your numbers are way off Cummings estimates: .1 ( 71mpg - 62mpg) = .9mpg difference is what you should expect. You reported 7.39mpg - 5.66mpg = 1.73mpg difference far more then expected.

Listen, I am not just going by Cummings rule of thumb. My experience tells me also that those numbers are way out of line. Believe me or not, I have checked fuel mileage number on a verity of trucks and conditions, and have never come up with numbers like that. However, almost every one that reads the fuel computer in the truck comes up with numbers like you quoted. I have been in this argument before.

It is the same math one uses to come up with fuel milage figures. You know how to do that? Give it a try.

Running at 71mph over 2352miles = 2352/71 = 33 hours
-Running at 62mph over 2352miles = 2352/62 = 38 hours

The difference being 5 hours

With your fuel savings at 415gallons - 318 gallons = 97 gallons

97 gallons say @ $2.20/gal. = $213.4

$213.4 / 5hours = $42.68/hour.

As an O/O you would have to be selling your truck service for less then $42.68 an hour to make bank on lowering your speed from your inflated figures.

@ 71mph and $2 @Mile freight your truck should be collecting $142 a hour: $42.68 savings an is not worth it even with your inflated figures.

And I say the real savings, from real mpg figures, from lowering your speed is about half of what you report: so about $20 an hour vs $142.

 

Are you native American? If not, you are also a foreigner, just not in the first generation. Also, the gazillion of Mega LP operators are good old rednecks and African-American, you rarely will see a fresh immigrant in that division.
Another thing. In Michigan, where I live, lots of people hate Canadian truckers and blame them for cheap freight, even though I tried to explain numerous times, that not many Canadians take risk of hauling freight inside the US.

 

Driver 1: "The sun will come tomorrow morning"

Driver 2: "Bull crap. The sun most certainly will NOT come up tomorrow"

Driver 1: "okay"

 

Help me understand why we are worried about what everybody else is doing ?

What am I missing here ?

 

I'm with driver 2. Apparently you have never been in a MI winter.

 

I had to read this 2x to make sure you weren't being funny. That is trucker math defined. Unless he dropped a gear (which he didn't or he would have said) it's the same number of engine revolutions between point A and point B regardless of speed. But I will admit you made me think.