i have a '95 1.8L geo prism [aka corolla] [154Kmiles] with a hidden hitch 1.25" receiver. i tow a small utility trailer rated at 1000#s. when fully loaded, it is noticeable and mpg drops from 30+ to around 22 and the trany spends a lot more time out of OD. i don't usually drive over 65 on the...