Paccar vs Cummins

Paccar engines are complete junk!!!!!!!!!

 

What is your application?

 

Lots of variables and just my opinions here... I work with fleet that is running Paccar MX engines. We tried Cummins in 08, ISX CM871. Egr coolers, turbos, after treatment injectors, doc face plugging... We all know the issues. With lots of maintenance they are ok at best. Starting running the MX in 2011. We have 23 of them now. As far as iron goes, MX is superior. No oil consumption issues, dropped liners, or dropped valves. They did have a camshaft campaign, but those should all be fixed/case hardening issue. The oil analysis comes back tremendously better on MX vs Cummins. From turbo back, it is same on both and made by Cummins. That is where 90 percent of issues are. Seems 2013/common rail MX are better than 2010 EUP setup. That being said, Cummins are easier to find someone to work on them because everyone seems to have Insite. Both can be "tuned" and most of your issues will disappear. I know people running "tuned" MX's and they love them. Don't plan on taking it to a dealer if you want it worked on though. Have to find independent who knows back MX. Best bang for buck for owner operator I hate to say would be glider with Series 60 if wanting fuel mileage and glider with Cat if wanting power... Just my opinions and experiences.

 

Check out trucker Dan on YouTube. He just started running a 386 with MX pulling for Mercer.

 

I bought my '12 Cascadia with an ISX @399,300 miles. I've put about 45,000 on her, some very tough, some easy, so far so good, very good MPG with 10 speed / 3.58 ratio.

 

Best I can due with my isx 15 2010 on paper is 5.6 mpg; have changed all sensors, cleaned cans. Like the engine, just wish mpg was what the guys on rawze talk about.
10 speed, 3:55 rears on 24.5's

 

Paccar have a lot of sensor issues usually because of the harness underneath the truck going to the right frame rail. Also they don’t make any power until nearly 1600 rpm. If they were to be emission proofed they might be decent, but a normal paccar is a check engine light nightmare.