And no one can read the engine software. Am going to be purchasing a new flattop 389 Peterbilt, been hearing good about the Paccar MX motor and the Cummins ISX. The only complaint I get from them is about the engine brake. But nothing like the 2008 ISX. My ISX has served me well over the last few years. In fact, theyre getting the highest MPG numbers for any engine in our fleet right now. Valve Corporation. The 6.7L Cummins Engine is developed by one of the fortune 500 companies of the USA i.e., Cummins. > :P. PACCAR has gotten better over the last few years. Suitability for your application/business. RavenHawk. Theyre so new you pretty much have to go to a Kenworth dealer to get them repaired. The only problem I know of with the ISX is the EGR valves go out around every year and a half tor them. Or spend the $3000.00 on the extended warranty. Better yett, Build a glider Kit. But in a lot of cases, the Kenworth dealers still dont have the diagnostic equipment, either. Weve been running the MX13for 8 months now. All trademarks are property of their respective owners in the US and other countries. Torque ratings range from 1,450 to 1,850 lb.-ft. Atleast with the Cummins, I can drop it off and go back to the house. I would have to agree with all of you, especially the fact of the ISX being around longer is an advantage, as well as the fact of the lack of mechanics trained on the Paccar. It is a turbocharged diesel engine introduced in 2007, which is used in RAM trucks. Its also a driver-friendly engine in terms of a pre-trip inspection. But the packaging is good and access to the engine is good. And really, Paccar has a good brake on this engine. that engine is still fairly new on the market & would wait about another 5 yrs before purchasing one of those & then i'd still be hesitant. My drivers really like them: We have a fleet mixture of Cummins and Detroit power. fitzgerald out of crossville, tn; cheaper than new epa engines & better fuel economy. In terms of power, performance and fuel economy they are great. Home Both suck hot air and I have driving a K100 with a Detroit engine that had 450 HP and would put bothe of the said engines to shame. Fuel economy is a definite plus. Its just too complicated. I have zero experience with either of those engines but if forced to pick one it would boil down to HP and torque. 380 Cat This Cat diesel engine was strong, reliable, powerful and got decent fuel mileage. Note: This is ONLY to be used to report spam, advertising, and problematic (harassment, fighting, or rude) posts. Torque ratings range from 1,450 to 1,850 lb.-ft. A bit lud, but reliable and lots of power. Take the MX if it's enough but if you need more than 480hp then the ISX is the only thing out there in a new Pete. I too am hesitant to purchase a new truck with the PACCAR engine (eventhough I'd love to try it) based on the location of the dealer. For me it makes a difference in the dealer. Im hoping PACCAR brings them into the fold and gets them some training soon so I can get a repair if one of my guys does get stuck out in Timbuktu or somewhere. That goes back to the software that I mentioned. Some of the engines only have about 15,000 miles on them; others have around 75,000 miles. And thats a very aggressive engine brake. Paccars MX13 diesel engine has power ratings from 380 to 500 horsepower. You have to download the fault codes and send them in to Paccar. The whole process is too cumbersome. Most of them arent trained on the engine and dont even know what theyre looking at. We havent had to do any serious repair on them yet just general service and tune-ups. It is the latest engine of the B-series engine family, produced by Cummins. But he thinks anything over 62 mph is speeding. Looking for a little advice. All rights reserved. I bought three for starters and since have added six more. I've checked it out and it is not much more than what I paid for my new KW. In terms of power, performance and fuel economy, they are great. The fuel economy on the engines has been good. Jul 28, 2016 @ 10:27pm whichever is not so epa hogtied and will run without issues. Paccar is typically an fuel economy engine. Id like to be able to do the diagnostics in my own shop. As far as packaging goes, its a very-well designed engine. They are doing heavy haul in the oilfield and are averaging 6.5 MPG for the fleet. Our KW dealer in NE has treated us very well, but they are 150mi one way, and Peterbilt is 105mi the other. And the drivers tell me the PACCAR is the quietest engine of the bunch. We ordered new ultra-light KW T660's in 2009 and 2010 with ISM's, Had a 2008 KW T800 ISX. We dont have a lot of miles on them yet. Both in terms of filter and component placement and access to major systems. i'd go with the cummins isx also; that engine has been around longer & all the bugs have been worked out of it as compared to the paccar mx engine. My Kenworth dealer can. Just hoping you guys might be able to offer some guidance on making my decision. Atleast with the Cummins, I can drop it off and go back to the house. I have had them both. I would go with the ISX. Really, the only thing Im nervous at the moment with this engine is breakdowns out in the middle of nowhere. So far weve been pleasantly surprised by the engine. And one guy my best driver is consistently getting 7.5 MPG. The only thing I dont like about the engine well, its not the engine: Its the way Paccar handles the fault codes you get off the engine software. Id like more information when I get a fault code. The new Cummins X15 will be out soon. Maintenance has been very good. I'd like to try the new PACCAR engine, but I have CAT, Cummins, Detroit here in our small town. But theyre doing a good job. Maybe I will just keep my '03 flattop with the 6nz around a little longer! Our service support has been very good. The fuel economy on the engines has been good. I work with a company that runs both, and the Paccar's are always in the shop, but the ISX's are all hanging in there, with the older ones going to 18000 houirs without any major issues. The MX and ISX both use the same aftertreatment system exhaust. whichever is not so epa hogtied and will run without issues. Big Cam Cummins; 1693 Cat This is one of the best Cat truck engines. Posted by a private BulkLoads.com member. In fact, theyre getting the highest MPG numbers for any engine in our fleet right now. I'm a yellow guy, so first I'd say niether. My only complaint so far is that not a lot of people know how to work on them yet. We have had the usual trouble with emissions equipment, catalysts, ect. We have had the usual trouble with emissions equipment, catalysts, ect. Thank you guys for all of your input. #1. bubbawayne00. Espaol - Latinoamrica (Spanish - Latin America). 350 Cummins The 350 Cummins and the Big Cam Cummins engines were reliable but not especially good on fuel economy. < > Showing 1-7 of 7 comments . CCJ Magazine covers fleet management topics ranging from technology, freight, logistics, equipment, and more. I too am hesitant to purchase a new truck with the PACCAR engine (eventhough I'd love But nothing like the 2008 ISX. Its just that the drivers are used to the Cummins brake on the high-displacement engines. Both suck hot air and I have driving a K100 with a Detroit engine that had 450 HP and would put bothe of the said engines to shame. But all of them are routinely in the mid-6s on MPG. Kinda nervous about a buy of this dollar amount and want to avoid any potential mistakes. The highest-mileage engine is at 85,000 miles right now. What is an undefined code? They had a bad reputation, but now you can't say that one of the them is much better. also what u could do is; get u a glider kit with a detroit. I would say check out the International engine. You cant call an outside repair shop. But Ive had five undefined codes on the engine so far. My drivers really like them. PACCAR purely on the grounds that they are the reason we have Kenworth and Peterbilt in the game. Its a very technician-friendly engine. My only complaint so far is that not a lot of people know how to work on them yet. Forum > PACCAR MX OR ISX? But it is. The engine features a compacted graphite iron block, a high pressure common rail fuel system and a 1 million mile B10 design life. Paccars MX13 diesel engine has power ratings from 380 to 500 horsepower. Thanks again for all of the advice. The Ram trucks come in two variants, RAM 2500 & RAM 3500. So they dont think the stopping power is as good. The process takes too long and needs to be streamlined. They say you cant hear the turbo spool up and engine brake noise is nonexistent. Then they look at them and send you a fix. You can feel it kick in but you cant hear it. Thank you in advance. The drivers are generally happy with the engine. paccar vs cummins engine Which brand is better? Cummins provides more power to pull. Any input would be greatly appreciated as this will be my first new truck after the last five having all been purchased used. I have no way to find out and I cant always be running the truck by my Kenworth dealer so they can put their PACCAR diagnostic machine on it. Emissions equipment, either introduced in 2007, which is used in RAM trucks new KW! Peterbilt, been hearing paccar vs cummins 2020 about the paccar is the EGR valves out A very-well designed engine are the reason we have had the usual trouble with emissions equipment,,! The reason we have had the usual trouble with emissions equipment, catalysts, ect repair on ;. 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