Have a 2006 3500 Cummins and from the first " treatment " of the hotshot fuel additive, the motor runs smoother and my fuel mileage gained 2-3 miles a gallon. If anybody has any more pro's or con's on hotshot I'd like to know. And I've yet to try the oil additive yet so need input on it too.

 

I used the Hot Shot Oil additive last oil change at 125,000 and the engine seems to be running smoother.

 

Where did you buy the hotshot. Thanks