I'm about to buy a used truck now....i have 4 options....
2014 Mack CXU613, MP8, 450Hp, 2:64 ratio, M drive 12 speeds.
2014 Mack CXU, MP8, 450 HP, 3:42 ratio, 13 Speeds manual Eaton Fuller
2015 Kenworth T680, MX-13, 450HP, 3:08 ratio, 13 Speeds Eaton Fuller manual
2014 Kenworth T680, Cummins ISX15, 450 HP, 3:42 ratio, 13 Speeds Eaton Fuller manual
Now these are the trucks I owned before, 2001 Volvo with N14-good truck, good engine, 2004 Volvo with Volvo engine-bad truck, bad engine, 2005 Kenworth T2000 with CAT C15-good truck, strong engine but a fuel eater and always, always problems with the engine(3 major repairs, one overhaul), 2005 Kenworth W900 with CAT C15- very good truck, &&^&@@ up engine(2 overhauls before 1 million miles), 2010 Mack Pinnacle CXU613 with MP8 Engine - very good truck, best engine so far, I got it to 1 million with ZERO repairs, never needed to add a drop of oil between oil changes, 2016 Cascadia with DD15-decent truck, bad engine, it just blew up on me not even 10.000 miles after the warranty expired. All the trucks that I owned were 500-550 HP. Worst experience for me were the Cat's and the Detroit which lots of you guys praise so much, I don't even wanna hear about it ever again. Now I know the Mack MP8 , best engine so far, I remember that truck was pulling like nothing else before, a true bulldog. I don't have any experience with Cummins ISX, or with the Paccar MX. I hear so many people talking good things about them and so many people saying only bad things about both. No one talks much about MP8. The trucks that I have to choose from put me in a big dilemma.....i love the MP8 engine , but the Kenworth look so GOOD, next to the Lack which is not necessary a nice looking truck. HELP !!!! Lol