Not A serious concern In any event. Though we favor Cummins engines, we’ll label the engine class a toss-up between The 2 manufacturers. ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​�