Hey Scotty I have tried red line water wetter together with genuine long life Toyota coolant in my 2007 Camry. I have not seen any reduction in my temp gauge. My question is should I have seen a reduction or is it that the longlife coolant alone was doing such a good job that the water wetter didn't make a difference when I add it?

that wetter stuff is a joke, don't waste your money

Hahahha thanks much Scotty. I have first hand experience with this one. It's a BIG BIG BIG BIG BIG JOKE.