I seem to remember something about a warning about only using the proper honda type of antifreeze. Is there actually a restriction on type of antifreeze? If there is, is there any issue running some Redline Water Wetter in the cooling system? Its been quite hot around here recently and I want to make sure the car is happy.

 

There was quite a discussion last week:
http://www.s2000online.com/forums/showthre...&threadid=18210

 

I've had no problems with the product in my truck or S2000. I've been using it in my truck for about 3 years almost. I got my S in March and I have been using it since. One thing I did notice in my truck is that the engine doesn't seem to have any load on it when I use the A/C. The S works like a charm too with it too. I don't know if WaterWetter actually helps the engine performs better with the A/C on but it does to me. I just changed the oil today to Mobil1 at 5000 miles.

 

As I understand it, Watter Wetter is primarily a wetting agent. If you remember high-school chemistry, wetting agents reduce the surface tension of liquids (flat puddles instead of round drops). The reduction in surface tension in the cooling water/anti-freeze allows better contact with the heat exchanger (radiator), allowing the liquid to transfer more heat...

 

Exactly! An excellent addition if you want to forego antifreeze, but actually redundant and producing minimal change when used with the normal coolant mix.

 

Just an FYI on this subject. I changed the antifreeze in mine a few weeks ago with the recommended Honda coolant mix. When I bought the stuff from the dealer parts dept. I asked "what if it takes a bit more than this one gallon?" They walk me down to one of the service tech guys that they "allow" to work on the S2000's and he says "i would just fill them up with the coolant mix and then top it off with water (tap water)." I almost choked. I did this very thing though except I toped it off with distilled water and added water wetter. It took about 1.5gallons of fluid all together, but I'm not sure that it was completely drained. I have had no problems so far. I have come to the conclusion, however, that the Honda approved antifreeze stuff is a joke. As far as I can tell, it's just a 50/50 mix of antifreeze and distilled water.