they seem to be doing okay

[Carssuck]

The 6.4 has been out for about 5 or 6 months now and it looks like there are considerably less TSBs on them than the 6.0 had by this time.
It seems like things are going well except for the whole NavStar law suit thing.

[_CH_]

but from what ive seen a broke 6.0 will still get the same mpg as a 6.4 thats running well

[Carssuck]

If the E.P.A. wants to push diesel the way they say, then they better get on the stick and work on fuel economy.
It almost seems like 3 steps forward and two back, sure they run a lot cleaner but, the economy sucks ass, and who wants that.

[diesel71]

the dealer here has sold 18 of them so far and none have came back for any repairs.:rockwoot:down in vernal utah they have sold over 20 and only one came back, the owner didnt understand the regine mod and thought somthing was wrong. the 6.4 is looking good but it's early yet. im thinking buy late august early september we will know more.

[brrs3633]

Yeah, once the SCT gets figured out all the way, and they can start disabling some of the sensors and putting on intakes and exhaust, I bet it will get better. It is still early as far as the mods go. I cant wait to see how they do though.