I've been looking at a 2008 f250 and i was wondering what is the highest mileage anyone has seen on these engines? what kind of life can i expect out of it..

 

I know a few around 230K and still going.

 

Do any of those still have the DPF? Hard to see any of them lasting that long if they make oil for the duration.

 

There's one on Ebay for sale with 260,000 miles. Seller didn't mention DPF either way.

 

I think most get deleted after the warranty is gone.

 

The majority of stock trucks don't make oil. Mine never did.

I don't think they do. Lots of these are trucks are owned by fleets, and the majority of them aren't interested in running afoul of the EPA. Lots of other folks never heard of FTE or any of the other groups who advocate tuning and just drive their stock truck.

 

I've seen quite a few now, in cube trucks and such that have 300,000 km's or better and DPF on.

 

Might be different in different states, but I have a buddy that has about 6-8 6.4's in his fleet and they are all deleted. I've also seen quite a few company trucks with black exhaust tips so I'm assuming their deleted too.

 

I'd be doubtful of that word majority. Mine sure did, up to 6% on one anaylsis. Now, if you say the majority of owners don't know their truck is making oil, well that's a different story. If they don't have the oil analized they wouldn't know. I would submit that the design of the back cylinder injection DPF system insures oil dilution. The EPA report even says so, but they say it won't cause enough additional wear to have an impact on the useful life of the engine. i also don't think it an accident that the crank case dip stick on these trucks is almost imposible to read. I've been checking oil since around 1957 and I've never seen a more difficult to read dip stick.

 

I'm pretty sure it isn't just the 2 back cylinders that spray to regen, it's all 8.

 

Could be, but I don't think so. I'm no expert that's for sure but I sure thought that on the 6.4L the regen was accomplished by the two back injectors firing on the exhaust stroke. Now there is another system that uses a 9th injector down in the down pipe to fire the regen. Presumably with a lot less dilution.

 

Yeah the 9th or 7th injector system is better in a lot of ways, but I guess ford and international figure it's better to reduce part count by putting fuel in the oil. With the injector in the exhuast, there should be no extra fuel in the oil.

I'm standing at all 8 cylinders do the regen.

 

6.4 uses all 8 cylinders.

6.7 just uses one bank (4) to inject for the regen.

 

OK then my bad, that even seems worse than firing from 7 and 8. 4 times as much opportunity to get diluted. Ugh.

 

I have 267,000 on mine. Bought it at 245,000, had to replace a pair of rocker arms so far. Runs very strong, feels like a 2012-I test drove one. Never deleted, although I plan on doing it.