I too considered/wondered about using Evans coolant. One potential plus for me what their advertised anticorrosive feature. However, after thinking about it, much of the corrosion in the cooling system is due to dissimilar metals and electrolysis, not the water in the glycol/water mix. As a result, I'm not convinced that Evans helps in this regard. The other feature they advertise is that it does not build pressure in the system (supposedly you can/should use a zero pressure cap). I'm not convinced that's a good ideal as I assume (and I'm no expert) that the pressure build up assists in the circulation of the fluid (please correct me if I am mistaken). As a result I've passed, but I would love for them to perform some of the same real tests that Water Wetter has run and demonstrate the results. Their product is pretty expensive and if you blow an old engine because of it, it is going to be a VERY expensive experiment.