I agree w/Gary in general. However, I used to have a Honda Odyssey. The manual said nothing about towing 4 down. I asked the service manager about it and he printed the procedures for towing the Odyssey. Never did figure out why it wasn't in the manual.
I haven't read this whole thread, so I hope I'm not repeating this. I can't remember where I found it, but there is a master list of towable vehicles. I think it is from Motorhome magazine.
07 Dutch Star 4304
Celia 10, Alec 8, Bella (Greyhound), Isis (Abyssinian)