Which Paccar MX 13 do I have

i got screwed like this also i bought a 579 2014 pete and assumed it would have the 2nd gen paccar but its actually the 1st gen about 12000 bucks later in 7 month span im ready to get out of it i figured if i can handle that make my truck payment amd still sace i can handle a brand new glider payment

 

Wowzer! I like this 2015 579 mx13. It's got over 400,000 miles just went out of warranty. Fuel economy seems very good. 7 to 8. If it were fine tuned it would do better. But I sure do love a series 60 it can achieve real good fuel economy when they are cared for.

 

i never calculated my true mpgs but i never get over 6.7 loaded usually around 6.5-6.3 on the dash and i never go over 66 loaded unless im.pressed for time and its a automatic

 

Oh man 6 sounds like a dream to me lol, I get 4 to 4.8 hauling 140k...

My other truck has a 515 S60 that gets 8mpg at 90k

 

Far as I see people chatting they hate the first gen mx13. And the 2nd gen is way improved. This truck has an apu so I do not idle. Anything over 67mph on flat roads seems to decrease fuel mpg. Any head wind and fuel goes 5.5 to 6.5 mpg showing on dash. I am curious what a tuned mx 13 can do with all the crap removed. And I have saw many mechanic threads talking about how modern oil change interval is to much miles. Bottom end bearings are showing to much wear for the time on engines. That is something to think about.

 

You had the 455 up to 530? If so how is it now compared to before, I plan on going that route and up to 550