Home > Forum > Paccar MX 12.9L On A 2012 Pete 388 Day Cab, Thoughts?

Paccar MX 12.9L on a 2012 Pete 388 day Cab, Thoughts?

Jun 08, 2020 at 10:06 AM CST

Last week i bought a 2012 Petebilt 388 Daycab with a paccar MX 12.9L with 200k on it. I bought it on a whim, without doing much research. Now im trying to do some research and it seems like people either love it or hate, no facts just opinions. Just seeing if anyone has any experiance on these engines and what your thoughts are.

Replied on Tue, Jun 09, 2020 at 05:00 PM CST
Well I have been running that engine since 2015 and it has been a great engine the Early ones some were good and every now and then there was a bad one. The only reason I heard of making them bad was the fuel mileage. If you bought it right it should make a good truck. By the way we pull up to 120,000 with our Pacar 12.9 s.
Replied on Wed, Jun 10, 2020 at 01:12 PM CST

I have one a 2012 KW with one of those Engines in with almost 800k with no major work done to it. Works great

Replied on Wed, Jun 17, 2020 at 07:22 AM CST
+ 1
I have 5 of them, decent engines, but you will be spending money on sensors. Older ones are more problematic.