The 6.2 just like the cummins and the powerstroke or even the japanese diesels or the volkswagens, all are diesel only and will not like anything else. The only multifuel engines are the military deuce and a half and 5 ton rigs.
The 6.2 gets better mileage than the others but because of it doen't have the power to compete with them either, it does however have the power to tow and to cruise, speed is where they lack the power for when towing.
The cummins, powerstroke and duramax have enough power to tow with speed.
The 6.2 wasn't built to compete with HD motors, it was replacement for the 350 gas engine.
Want to hear good things about them?
Here goes:
everybody thinks they are junk so you can have them cheap.
There was enough of them produced that you can find used ones all the time.
There are so many that didn't even get the chance to go bad because the owners thought they were too slow so they replaced them with Gas engines.
They get you about twice the mileage of a 350 with similar power