Well I have had a 07 with 6.7 the truck got 18mpg with a automatic an 410 gears. I deleted the egr and emission on it at 220000 miles. That was my only complaint with the truck besides the poor fuel mpg when pulling. I sold the truck with 300000 miles and its now got 400000 on it. I now have a 11 5500 with 87000 miles on it with no problems at all.
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