I have a new aluminum radiator being delivered today which I am going to install on my 1978 FJ40 this weekend. The manufacture is recommending Zerex Coolant / antifreeze .... I live in Southern California , so what would everyone recommend? There are so many options ... 50/50 antifreeze coolant, Red and Blue ( it says for Asian Vehicles ) , Original Green , Extended Life .... any help would be appreciated