I towed a 24' Rance aluminum enclosed trailer, full of tool box, tools, furniture etc...1200 miles each way last weekend. Total weight is tough to say but the trailer is 3000lbs. and I figured between 3 and 4 thousand in cargo. I have a 12000lb Equal-i-zer brand hitch, and used a Prodigy brake controller. The tow was smooth overall, I could have used some rear air bags to level it up though. Power was lacking uphill, not too bad but not the power I was hoping for. It got just over 8 mpg 1200 miles there, and just over 9 mpg 1200 miles back empty according to the trip computer. My wallet still hurts- and getting gas every 160 or so miles got old too. I maintained 60-70 mph except some hills where 50 was all she had. Still it was up to the task overall, so I give it a B+ for max capacity towing.