Ok this forum convinced me to walk away from a 6.4. Now we are on the hunt for a 6.7! We found one with 110000 miles a 2014.

Is this a safe truck to look into?

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I would look to see if the truck is deleted or stock, and secondly is there any maintenance records on it. I don't recall any issues, but the 15 and 16 models has a better turbo. Just saying. Good luck.

Yes it's safe to look into, but you haven't said anything about it to give any advice. Post a link to the ad. Everyone who owns a 6.7 expects their truck to go 110k miles and keep going with no problems.

That truck has been sold (they forgot to remove ad) so I am back to searching. But after reading about the 6.7 vs the 6.4 I feel like we can narrow our search to one engine. I'll post the link to the next potential

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I just trade my 2010 6.4 with 137000 miles never a problem . just started to rust .. n.e ohio , got a 2013 with the 6.7 and love it with 95000 on it .I got the ESP with it for 3 years /

Watch idle hours (want low = 10% +/-) and look for the normal wear and tear items/ leaks. Maint Records are very valuable.

Glad to hear you decided on the 6.7. I own a small used diesel dealership, and we do not buy or sell the 6.4. I love the way the 6.4 drives, and I love the power it has. I think they look great and perform well, but the reliability of them is a major major concern. We sell tons of 6.7s and you are definitely making the right decision.

In terms of mileage, something with 100k or more is no concern. We see them come through with well over 200k and no major issues at all. For diesel trucks, mileage is not the concern - it's maintenance. I would take a truck with high miles, low idle hours, and maintenance records over a truck with half the mileage and thin records.

Typically interior wear is a sign of how the truck was maintained mechanically. If the truck has lower miles but looks beat, it was most likely used pretty hard and not taken care of well. I would not focus on mileage and focus on records, and cleanliness.

Let me know if you have any more specific questions!

110k is not high miles

I concur, if time is available sending off for an oil analysis is a great way to check on any internal issues. I am a big proponent for 2015 or > for the following reasons. More power and torque, improved fuel system (HPFP and injectors), turbo is larger 72.5mm vs 64mm with improved durability, Improved down pipe, Improved exhaust manifold and valve train, improved crankshaft and bearings and improved dampener.

Can anyone tell me what the downside of high idle hours is? Recently purchased a 6.7 with an alarmingly high ratio of idle to engine hours, more than I’d like to admit and am starting to worry if I made the wrong purchase.