although its not 100% scientific, i am really impressed with this product. after replacing my head gasket, i decided to give this stuf a shot. when i was running a 50/50 mix of antifreeze and water my a/c fan would kick on at 200. I am now running a 15% anitfreeze mix and a bottle of water wetter. i felt like my temps had been down, but today after running erands during lunch i noticed that with my a/c on high and in stop and go traffic my fan never had to kick on. (granted its only 90 here and not 100 degrees like most of the summer, but i still think im impressed.) Has anyone else had sucess or failure with this product? is it just snake oil?