I have an 06 GV, and it does not rack up miles while being towed. The other major restriction in the owners manual is to tow at 55...which I don't do...I'm usually towing at about 60 or slightly higher. It also specifies running the engine in drive every 200 miles, which I do...we stop every couple of hours because the driver has a weak bladder... I always run the engine when we stop