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mpg increase on 2014 cascadia evolution

i just got my second truck after my first had a lot of issues, i had a 2012 kenworth t700 which had duels on it and got 5.5-5.8 mpg. I recently upgraded to a 2014 cascadia evolution which in my opinion is a very nice truck, good engine and decent aerodynamics.

here are some specs of this truck

Engine: Detroit DD15

14.8 Liter 505HP@ 1800 RPM

Transmission: Eaton 10 speed

Rear ends: 3.41

Steer Tires: ContinentalHSL2 Eco Plus

R/R:97

Drive tires: Xone XDN2

R/R: 119

Now i know i can get better rolling resistance with changing to a the tires, and i know adding airtabs will help with aerodynamics. But what about other products that work what else is out there?

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So far i am getting 7.1over the last 3600 or so miles pulling a trailer with no fairings or other aero products on it, with side skirts and super singles on a trailer i got 7.6 pulling it a little over 1800 miles. going to start tracking it on fuel gauges since i had a chance to add the truck in to my account and remove the other. just added my first fuel up on there Sunday.

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So how are you doing on fuel mileage now? The reason I ask is cause I did just the opposite I got rid of that piece junk Detroit I had and went to ISX cummins so far lot happier no where near the problems and fuel mileage is running at 7mpg.

I don't think there's a whole lot you can do to the new trucks other than what you stated already

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Jason Leith will be eternally grateful.
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