Updated Fuel Mileage Record-9.1 mpg

[Hammerhead]

(05-10-2018 )lonestar16 Wrote:  i have to ask do yall really drive that slow what is the posted speed limit..if it really work ill slow down i run 65 now in get close to 7mph

Most people don't get the whole "slowing down" thing. They try it for a while and don't really see any gains, so they give it up...because they're doing it wrong!

When you drive faster, you drive with your cruise on, and your jakes on...when you go up a hill, the ECM gives fuel, usually full throttle in an attempt to "maintain" the cruise set speed, then when you crest as fast as you can, you pick up speed and break your threashold quickly and the jakes come on.

Let review, your ECM is just a dumb computer, and it only knows what you tell it. By running with your cruise on, you told it "maintain this speed at all cost" and it tries to do exactly that. It gives full throttle pulling the little grade, hint using energy, aka fuel, then as you crest the grade and roll the downside, you exceed the threashold and the ECM once again tries to "maintain this speed at all costs", hint by absorbing free interta energy and transforming it into heat expelled through the stacks that once it's gone, it's gone.

Now try this on for size, kick the cruise off, use the throttle to hold 20psi of boost and crest the hill at say 10mph slower. Now you've burned less fuel going up the hill!
Now pay attention, cause here's the real advantage, now you can kick the tranny into neutral and coast down the hill and not absorb the heat from compression holding yourself back and roll down the hill for free! Slowing down DOESN'T MEAN NEVER BREAKING 55-60mph, just don't use fuel to break 55-60! And don't use your jakes to hold it back to 55 if you can coast for miles for free, take those free energy miles and laugh all the way to the bank
Now repeat this 100 times or more a day, and that is when you'll start to see the results.
I've let mine roll up to 70-75 in WY many times, and I can usually roll for miles at a time! Hit the bottom of a roll at 75, and have enough momentum to roll right back up another small roller and crest at 35-40, and do it all over again! There is one stretch of I-25 that I can roll in neutral for over 17 miles! From 30-72mph. Here's just a little fun math on that stretch of road...I don't work for less that $10/mile (look at the size of my unit above and don't ask, it's just how it is), so that means I generate over $170 of revenue on an ounce of fuel, about $0.18 worth! That stretch takes me about 22 minutes. So at >$169 for 1/3hr that works out to over $500/hr! If I offered you $500/hr to drive 30mph and watch everybody pass you, would you do it?
It takes me 19 minutes to run that same stretch balls to the wall, and I can assure you it takes one hell of a lot more fuel when your 170,000lbs pulling full throttle. I save about $15 of fuel money at a time penalty of 3 minutes...at 1/3 of an hour, that's $45/hr, do you make that?

Slowing down doesn't mean driving 55mph ALL THE TIME, it means changing your mentality and driving style...so you're not WORKING the motor all the time! Master that, and your Profits will be your Master, not the quantity of miles you run...

Look at it this way, I'm your dispatcher and I have two runs to offer and you get to decide:
1)750 miles/day for 3 days, takes 10.5hrs/day, pays $4/mile, gross revenue $3000.00
2)500 miles/day for 3 days, takes 11hrs/day, pays flat rate of $950/day, gross revenue $2850.00
Which one pays more?