Because everyone I know that has had the 6.0 and 6.4 have had them spend more time at the dealership then on the road. My boss has gone through 2 08' 250's and two engine on the second one. both of them with less then 50k miles on it. 2 trucks and 3 engines in not much more then a year = junk. The shop I used to work for had a 6.0 250 and it constantly was running on 7 cylinders it has about 220k miles now. The 7.3 in the CC has well over 300k and has been abused and just keeps going.
I would definitely question your claims. My diesel guy, who's a FORD certified Powerstroke mechanic, who has touched nothing but Powerstrokes since they came out (at work), tells me he's replaced only TWO 6.4 motors. And both with burned out #2 and #3 cylinders, after someone else installed the FORD TSB mandated cooling cross over T.
I don't know what "morons" your friends are. How often they change the oil, what oil they use, where they get their diesel fuel (not all diesel fuel is the same, you want to get diesel at big truck stops, not mom and pop stations that sell 100 gallons per year), how long they let their trucks "warm up" before they drive them, and lots of other such silly non consequential (it seems at the time) facotrs.... damn, that was a long sentence...
As cliche as this may sound, a diesel works best and last longest when it's actually working. You know, pulling heavy loads, doing the stuff it was designed for. Buying a diesel just to keep up with the Joneses leads to issues.
Whereas you speak from what your "friends" and "boss" have been through, and again, I speak from experience. Who knows, maybe I just got those two good FORD trucks in existence... however, I doubt this to be the case, since everyone I know with a diesel who works them and takes care of them, doesn't seem to be having these problems either. Sure, you'll always have a bad apple in the basket, but come on! You can't call something junk because you heard someone complain about how "junky" something is.
At least we agree on one thing, that dodge trucks suck.
Uhhh. No. I never said that Dodge sucks. The Cummins motor in the Dodge trucks are f'ing great. Matter of fact, I'm getting a 5.9 ISB with two turbos installed in my F450 next year. As great as the power stroke is, it's hard to make it put 1500 FT lbs of torque to the ground reliably. Whereas a Cummins can do that all day long. Where Dodge fails, is in it's construction. Damned bodies start to fall apart after 50K miles. But for 50K miles, they are great.
The only person I've known to get more then 15mpg out of the new ford diesels had 6 speeds. You have a 6 speed?
Again... Experience over what you've heard. I'm getting 19.5 empty and around 17 pulling 37,000K GCVWR.. Yes, I know a little over legal, but eh. And yes, it's an automatic, not a 6 speed. There's more to fuel economy than a transmission. It kills me when I hear people say "well, I get 21 miles per gallon!" "That's great. What gear ratio do you have?" to which, I usually get a "huh?". I'm running 4.88 gears in the F450 (8L Axle code), and I'm getting great fuel economy. With a Gear Vendors overdrive, (3.80) I can easily see 25MPG empty. Thankfully, I've never been one to concern myself with fuel economy.
On the duramax engine's I only know one person that have had problems and he was a friend of a friends dad and he got the variable turbo when it first came out and it blew up.
Again, friend of a friend experience. You can't base your belief in something being great or junk on a couple of stories.