To be truthful, I don't really notice a difference with power or miles per gallon. The towing capacity of the hitch on a Seneca is 10,000 lbs. With no tongue weight, because Traverse is on its own 4 wheels, and we are only half or 60% of towing capacity, its not an impact. I'm really glad we have the backup camera, that is always on, because otherwise we would forget it is back there. We get about 10 to 11 mpg's on a new Seneca Cummins engine with less than 7,000 miles on it.
Ric and Jan Golding
2016 Jayco Seneca 37FS