i pull my kendon w/ 2 bikes with a chevy silverado 5.3 motor. i don't even feel i was towing it. mpg about the same. california highway allows 55 mph for towing trailer. sometimes i do 65, sorry i can't help you as far as its behaviour at 80. i never worry about the paint chipping off since my kendon is deteriorating from inside due to poor weld quality and bad metal prep prior to painting..... btw, my kendon is not made in china.