I have heard that we should use the green stuff, not the orange stuff, due to compatibility of chemical properties with the metal in our old stuff. Maybe someone knows more about that issue.
Have a look at www.liquidintelligence.com.au this stuff is a complete fill, not a water additive, boiling point 190'C, freezing point -56'C, no corrosion, no rust, no scale, no electrolysis, better heat conductor than water. See their website for the full explanation "Synthetic Waterless Coolant".
I have a 40 Deluxe that had a bad heating problem, couldn't drive it in summer here, this fixed it though!