Just got done reading a article in Diesel Power magazine. They did a week long test that covered 2000 total miles to determine the most powerful diesel truck. They tested the GMC 3500, Ford F-350 and Dodge 3500. The test included pulling a trailer that weighed 19,400 pounds in a quarter mile race. Gmc finished first, ford second and dodge last. Also had them pull the trailer up a 12 mile stretch of the rocky mountains. Again gmc won with a time of 9:09, ford second with 10:16 and dodge last with 11:49. Through the quarter mile, the longer the race went on, the gmc and ford pulled away from the dodge. After all the tests were done the Gmc was declared the winner. Just thought it was interesting because so many people say the cummins is by far superior to the duramax and powerstroke but finished last it almost every test they did.