correct anti freeze mixing ratio

I normally use a 30% anti freeze to clean water mix ratio.
I stay in Johannesburg South Africa and this time of the year we constantly see temperatures of 30 / 35 deg c .and even higher
To strong a water /antifreeze mixture causes less heat transfer
thanks.
Willie.

A third antifreeze to two third purified water is a good mix, But the important part is the anti corrosion elements in it,
Only use quality ethylene glycol suitably for aluminium components,
Even with long life antifreeze the corrosion inhibitors have a finite life so I would change it every couple of years
To be on the safe side,