Quote:
Originally Posted by popatop500
I am looking at buying a 2009 6.4, what is regen ? The truck I am looking at has 3:55 gears, can I expect better mileage because of the highway gears. I have a very light foot and just use the truck for work driving and haulling materials on weekends I haul a 2600lbs camper and small utility trailer. I currently get between 16.4 and 18.81 on my 2004 6.0 with 3:73. Any advice ? Wait for the 6.7 ?
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Regen is what happens when the truck attempts to burn out all the soot that the DPF has trapped. It increases the exhaust temps so as to burn up all the soot thus cleaning the DPF. Happens on average, once per tank on normal driving, more if you tow.
Also affects the mileage of the vehicle. How much so depends on the vehicle. Some have seen a drop of 3-4MPG others more.
As for waiting for the 6.7, remember, it's a brand new engine design with brand new problems. It will have the DPF like the 6.4 engines or any other modern diesel so it to will be affected.