6.7 Cummins Non DEF vs Newer DEF Trucks
Hi, I used to have a 2008 6.7 CTD 4x4 which towed great but the fuel economy sucked and I know many folks had issues with the first era of emmissions "bluetec" trucks. Last week I picked up a new 201...
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I understand economy is a tad better on the DEF models. My 12 was the last year without it. I have the H.O. Cummins with 4:10 gears. Average about 17 hwy. empty. 9+- towing 14,000 fiver.
