Should he go for it?

[KT Performance]

The 2011 6.7L Diesel has significantly high MPGs. I don't remember the numbers off of the top of my head but it is a big increase over the 6.4L.

If he wanted a 6.4L, I would wait a couple months. The 6.7Ls are just hitting the dealers around here and the prices on the 6.4Ls should be going down so they can move them.

Kenny

[Jeremy]

Remember just because the 6.4L gets poor mileage stock, you can buy alot of diesel for a 15k difference in buying a truck, based on a 5 mpg difference (6.7 vs. 6.4)

So based on a 6.4 getting 14 and a 6.7 getting 19, with diesel $3.50 a gallon it costs you $65.78 more per 1000 miles to drive a 6.4 over a 6.7. You can drive a 6.4 alot of miles to recover the $15,000 price difference. Which should be ~228,000 miles.

@ $4.50 a gallon its $84.58 per 1000 miles, or a total of 177,333 miles.

I hope that made sence


Here's another option, DPF delete with a Gryphon will get you closer to the 19mpg the 6.7 makes. I don't have a a 6.4, I hear 17+ is not out of the question.