dont know if it will help you much but i have an 05 with tranny cooler and the 4.7l and i pull 6,5x12 open landscape trailer closing in on 100,000 miles I also have a ram 1500 5.2l it has 135,000 i'd rather tow with the dakota because of manueverability gas mileage is about equal. my dad also owns an 02 dakota with the v6 motor and he tows one of my trailers during leaf season not sure the mileage he gets but does not have power to pull the trailer when its only loaded with leaves and a blower. they no longer make the dakota but will bring it back in a year or two but it will be on the same line as the honda ridgeline so my next vehicle will def be a full size truck
2013 Dodge Quad cab w/hemi
1996 Dodge Ram 1500 Extened Cab
Toro ZMaster 400series
MTD PRO 48"
Tow-rite Hawk 12x6.5 Dump Trailer
Landscapers Trailer 12x6.5 w/side gate
Echo PAS multi tool
Various other Echo hand helds
Little Giant HPV Vac
monster 18hp debris loader
Multiple Toro 21"