Antifreeze question

[Grant Bowker]

In my, non-expert, opinion we don't need to worry about aluminum compatibility (unless we've installed a replacement aluminum radiator).

Most older anti-freezes were both cast iron and brass compatible as those were the materials used in period vehicles. A decent quality green antifreeze (extended life if you wish) is probably adequate, probably no need for yellow, red, orange, OAT or other buzz-word products. Also probably no need to go for higher than 50/50 anti-freeze/water. Higher concentration does gain some freeze point advantage to a point before falling off but it would be rare to come close to needing it in our part of the world. It is probably more important to have a good anti-corrosion package than an extreme low freeze point.


It is good to hear that you are getting to the point of filling your cooling system.