Well I got the deal they had on the 06 6L diesel for two reasons 1 the 0% and the fact the new EPA engines aren't flying yet with hardly and diesel maker. What does that tell you. The government screwed us again and I wonder how many will loose their jobs because of this stupidity.
I really hope the new 6.4 is a great engine from the get go but from what is leaking out it is worse then the 6.0 was when it first came out. I would wait at least 2-4 years to see just how good these new engines are.
Like others have said the more crap you put on an engine the worse the mileage and the harder to maintain. Doesn't seem right to me to buy more headaches.
my 3cents