If you're not overheating, what would they be?
The entire purpose of the product seems to be:
*obtaining better corrosion resistance than straight-water
*obtaining better thermal efficiency than straight water
*allegedly better thermal efficiency than coolant mix
How they achieve the third one is beyond me.
It's a simple fact that there are a lot of products out there that can reduce the surface tension of water in order to obtain better thermal transfer efficiency. Older racers use to add a dose of dish soap to straight water to get that effect.
It's a no-brainer than a chemical composition could be added to water to reduce corrosion.
I'm not sure how they improve a coolant mix to increase thermal transfer ability.
But in any case, if you are not overheating, the most this will do for you is bring your coolant to thermostat temp. If you're not overheating, then you are already there.