Did just under 1300 mile trip. I kept all fuel receipts, and left on full. Filled back up to full once home. 100% of the time I had a sea doo attached on the rear, wtih tool box and gear (about 100-150lbs counting the box cause i carry 2 spare trailer tires, torque wrench to change if needed, spare jack, and parts if needed....I'm not a fan of trailer tires lol). Dry weight of the sea doo is 757lbs, trailer weights 265lbs w/o tool box.
With 75% of the travel on interstates, doing 65-75mph I averaged 21.18mpg for the entire trip. I am re-tuned, and do get much better than sticker. While on the interstate I drove in M5 most of the way because I do not like the tranny getting out of OD for climbs. Rarely would the tranny drop to 4th to pull up, this included on the trip having 3 other adults in the cabin, and the cargo area full of suitcases/gear. Pulled what I needed very nice. Over 50% of the miles on my Nox (6100miles) are pulling either sea doo, uhaul loaded with too much gear, or utility trailer around. It pulls very nice in the low weight category.
What does have me wondering on specifications though is this
SRX w/o factory aux tranny cooler 2500 max
SRX w/ factory aux tranny cooler 3500 max
Nox using same engine/tranny 3500 max (no aux cooler option), and its not a direct fit, the lines are completely different or I would have it already installed