^AnDre^

I run it on my track EF Civic. Pure distilled water and watter wetter, dropped, definatly keeps my temps down as supposed to just antifreeze and watter

CoralDoc

Water has higher heat capacity compared to an antifreeze/water mixture and will function better as a coolant. Water wetter is used to increase surfactant content, and does not contain anything to prevent freezing, nor does it work as well as an anti-corrosive agent.

Thus, unless you are restricted due to rules on the track, or have overheating issues that cannot be solved in other ways, it is better for the engine and cooling system to run an antifreeze/water mix.

MikeR90S

Yes. I worked well in my Ducati 748, my bugeye Sprite, my TR4, and my Series II Land Rover, helping all of them run cooler. I don't see the need with modern auto cooling systems though unless racing. Maximum heat transfer would be obtained with distilled water and water wetter. This is the combo mandated for motorcycle racing as antifreeze is slippery.

S2kracka

I just put some in my S2k since I got a bottle of it for free. First time using it.

The dishsoap trick worked great in my old Talon TSi, imediately lowered my coolant temps.

dead-bird

I have never needed to use it in a car.

However, I have used it in my RZ350s with success. Their cooling systems are marginal at best.

wildcardtrd

I'm running it in mine right now. I didn't really notice a big difference, but I also put it in when I flushed the coolant and installed a spoon tstat...I noticed that I can leave the car idling for a half an hour outside in the FL heat and the cooling fan (set to come on at 190 in the AEM) won't come on, telling me that my car is sitting at coolant temps of less than 190 at adle. That's pretty nice, but I'm sure the redline water wetter only attributes to a few degrees of that, at best.