Why decrease psi to increase less resistance? Correct psi is what increases rolling. Maybe the engine has a deficiency somewhere. Wouldn't a dyno test give him some in-depth info?
6.7 mpg on DD15
Discussion in 'Trucks [ Eighteen Wheelers ]' started by 3ARTransport, Feb 6, 2016.
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I drive a 2010. That's about what I average pulling pretty light loads.
No APU, so I idle about 30 hours a week.
Edit: On a side note, I really like the truck. Big truck and nice sleeper. Have absolutely no sensor issues, thanks to a good shop. Regens when I want it to. I only regen about once every two months.Last edited: Feb 7, 2016
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What kind of fuel do you use? Loves? Pilot/flying J's? TA/Petro? Loves has the worst fuel quality over all. Pilot/flying J's have high moisture and biomass content and it's hit or miss on the quality control. Overall the ta/petro have the best quality for a big chain fuel place. Mom and pop shops usually will have the best fuel overall. For every 5% of biomass in the fuel you'll lose 0.2 mpg.
Try driving like a prime truck, keep the rpm's at or below 1300. Shift between 1200 and 1300 and keep the boost down below 20.
As Kevin Rutherford says, you need to focus on driving for mpg, it doesn't just happen because you have cruise set. Get his scan gauge to help you monitor what's going on while you drive.
What kind of tires do you have on the truck? Do you hasn't super singles? Does the truck have the aerodynamic skirts on it? Do you have wheel covers on your drives? What about your trailer? What tires? Skirts? Tails?
All of those can help improve your mpg dramatically. As you can see from this list, there are many factors to getting good mpg. I have a 2015 evolution with 118k and my 90 day average is 8.5mpg but I drive like a prime truck usually doing 62-64 mph.3ARTransport Thanks this. -
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Slowing down is the easiest. Then I would look at wheel covers. I got the deflektor wheel covers at Christmas and saw an increase in mpg by 0.2 mpg pulling the same load multiple times that week versus the week prior without them. The wheel covers would run you about $200-300 for your drives.3ARTransport Thanks this. -
2015 cascadia I was driving the mpg was 5.9 to 6.5 max. Driving 70 mph
3ARTransport Thanks this.
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