You can tow 1000lbs. at any speed for any length of time.

You can tow more than this if you slow down, and don't do it every day.

Last week, I saw a FEH towing the 2nd largest U-Haul trailer they make, plus the guy had a cargo carrier on top of the car, plus 4 passengers. Oh... he was also climbing a 7% grade up the Rockies at 55+ MPH. Was he "over-loaded"? For sure.

Wow. Not sure if that's necessarily good for the car, but it was certainly capable. -John