As 6.7's begin to wear I believe it will be an issue. Some will do it and some wont (just like the 6.4). The unburned fuel that's in the cylinder during regen will slide past the rings and the fuel will get into the oil. Just like the 6.4 Ford probably will tolerate a certain amount of fuel dilution in the oil and will say that it's normal.

 

Thanks for all the responses so far. This is a good debate to have. My 6.4 has been in the shop several more times that what I ever expected for leaks, seals, hoses, multiple radiators, sun roof leaking, etc. I'm considering a 3500HD or 6.7 350. I'm simply "afraid" of going Ford next time based on getting a first year engine from Ford. Had I never owned the 6.4, I would be oblivious to the regen and the fuel in the oil concern. My oil has always been way over full by the next oil change. I did test drive a 6.7 F250 4wd Lariat and I have to admit, the truck was sweet. Everything appears to be "better", that's what makes it so hard to consider another truck.

 

Correction: meant to say known oil dilution issues.

 

It appears to me that in principle the regen process is the same but in practice there are major differences in the way the regen is accomplished. I did not own a 6.4 but what I have gleaned from admittedly small research is the 6.4 regen were quite long in duration. I have been told the advanced egr and associated emission control advances also have significantly reduced the completion time of the regen process. I can say that I have watched the clock and the mileage readings whenever I caught the message that regen had begun. I only lose around 2 to 3 tenths of a mpg over 8 to 10 minutes before the mileage begins to climb back up. I gained no oil, visual inspection only, during my first 4900 mile oil change interval.

 

Don't mean to hijack, but how did the oil look @ 7200 miles?

 

International designed the 6.0/6.4 to last at least 250,000 miles also! I find it very hard to believe the 6.4 will make it that long without some serious work to it. The regen process is brutal to these engines.

Anyone who is concerned about the regen process on the 6.7 has a valid concern IMO!

I would like to see actual UOA's on the 6.7 to confirm that fuel dilution doesn't occurr with the 6.7 because there is no combustion efficiency during regen since the exhaust valves are open during this process.

 

Troy,

I did not put those emoticons in my post where you quoted them. I put them following my Cheezit comment. I just wanted to clarify that.

 

My 6.4 usually completes regens in 10 minutes also. I always set my timer when I go into regen. The only time it will take longer is in city stop and go traffic which is not good for it anyway on either motor. I only lose around 2 to 3 tenths of mpgs also according to the meter. So little to no difference there.

The big difference in the 6.4 and the 6.7 during regens is the fact that the 6.7 only uses the left side injectors for regen, while the 6.4 uses all injectors.

 

The design life of the 6.4 is 350,000 miles not 250,000. According to their website. Everything else you stated I completely agree with.

 

Sorry... I didn't mean to take your missing teeth laugh out of context!

 

All is well. I just did not want any confusion where I stand here... right...

 

I picked up my truck with 198 miles on it. I saw my first regen at 245.

 

Fellas,
I am a 6.0 owner but do have an interest in the 6.7 so I am following the posts. Does anyone have a clue when tuning will be availabe for this thing? That would solve the regen issue as you would be able to prevent if from regening (i.e. Spartan for the 6.4). I know I know I know, that will have to wait until its out of warranty...just curious.

Yall keep up the hard work and posting info. I have to know that this thing is or can be bullet proof before I pull the trigger on buying.....and DAMN they are FINE!

Thanks (sorry for the hijack)