Anyone got a 3500 Ram 6.4 Good or Bad?

Verified that he is averaging 11 mpg. I have used it to pull the generator a few times and didn't notice it shifting much more than our 08 ford powerstroke but it is possible I just didn't pay attention. There reason I orderd the gas drive over a diesel is the issues the newer diesels seem to have since being emissions laden. 08 powerstroke had to have ford replace the engine at 62k because the way they did the emissions is to pump extra diesel through it to clean out the converter. Thinned out the oil too much and wiped out the lower end. I am now at changing the oil every 2500 miles on it because it starts to show overfilled. Had another customer that was havin issues due to the emissions on his 13 Dodge Ram also. I just didn't want the headache since I am the one that has to keep everything going in the fleet.
It was a stretch going to a dodge since the boss had only owned fords for work trucks and he did question why I went with the Dodge but after driving a bit he commented that it was the best truck so far.