I'm a little confused hearing some of your cars are running hot. I realize the temperature never really gets hot here in SoCal but I've taken our wagon to the mountains in Northern California, upper 90's and Las Vegas in 112 degree heat and the car has never gone over ~110 on the gauge, usually lower. The only times it has run hot, well above 100 consistently was when either the aux fans blew the fuse or the engine fan clutch died.