40 Below and Water Wetter
Ken, I have no personal experiences with these two products but I've been interested in them for some time. I found quite a bit of talk on auto performance boards about "30 and 40 Below" and "Water Wetter," both good and bad comments. The good reports are that they do reduce temperatures. The bad news is some users have found massive deterioration to the water passages in the aluminum intake manifold and are convinced that these products ate away at the aluminum much faster than a distilled water and regular anti-freeze mixture.
One hot rodder posted the following regarding his experience with Water Wetter: "I don't know if any of you have ever come across this situation before but I thought I should share the information I received from the technicians at Red Line Synthetic Oil Corporation regarding my recent experience with their Water Wetter product. It seems that if the PH of your coolant mix is too low the silicates in their product can come out of solution. In my case this manifested itself in the form of pea sized gelatinous globules forming in the coolant mix. These globules eventually float to the surface forming a thick scum. Fortunately, as I pre mix my coolant solution, this did not occur within the radiator. I can only imagine that flushing the gelatinous scum out of the cooling system would be quite a tedious chore, to say the least. The technicians at Redline suggested that the 50/50 mix is what caused the PH to drop too low and that using a lower percentage of anti-freeze and the minimum amount of Water Wetter in the mix should alleviate the problem. FYI, changing the concentration of the mix in an effoert to adjust the PH after the fact DID NOT bring the silicates back into solution. Rather than experiment with varying solutions I have opted to avoid the problem altogether by simply not using the Water Wetter product."
