Fuel Mileage

When he is going downhill with tail wind ! Maybe over 6 but doubt its stinger

 

I had a 2018 Peterbilt stinger with the mx13 Paccar w/ 13 speed that consistently got over 6mpg. The 2020 Peterbilt with an x15 and 13speed is averaging 5.6 for the first 135k miles. I almost never idle except for loading and uploading and usually just run the speed limits.

 

...i admit that i never had newer equipment but i always wondered how come one guy with the stinger gets over 6mpg and other with dryvan barely breaks 5 having same specs ....i have 6 most of the time with conestoga and aerodynamic truck , but i have c16 and 5 feen between truck and trailer gap

 

I have noticed a sizeable drop in mpg when I load trucks across the top leaving big gaps as opposed to 5 suvs.

 

That Paccar mx13 got 6 mpg without even trying. I bought it after a friend told me he was over 6 all of the time with a stinger. But the #### check engine lights weren't worth the extra mpg. X15 gets good enough mpg and zero problems.

 

Recently replaced my charge air cooler, also found that some unnamed shop had the ECM setting leave my fan on all the time. Probably done a couple months ago when I replaced my injectors. I am slightly deaf and didn’t notice it being on constantly. Gained .5mpg to 5.3 and loaded 90%. Also my dash says I get 1.2 mpg better than my calculator says I actually get.

 

I have 2014 vnl stinger with cx7 trailer, d13 and i shift, Mine Average stays over 6mpg running fully loaded mostly I95 anywhere from MA to FL. The 6.3mpg i would say is the average between dash, Ifta and fill up/ driving calculations.

 

Columbia single axel 14 liter 60 series pulling 6 car trailer maxing out around 54,000 gross consistent high 8s and some low 9s per gallon depending on vehicle profiles on the load.
Near zero idle time.

 

680 x15 endurant 12sp 8.0+
van/reefer

Some drivers get as little as 7.0 and others get as much as 8.3

Fleet average 7.5 No APU