Hello folks. I am going to perform a full flush of the coolant system on my wife's 1999 GS300 this weekend. Right now the fluid that is in it is the red colored fluid.
My quesiton is this: What is the correct type to replace it with? Do I really need to buy OEM Toyota red coolant or is the red Prestone good enough? I'm also going to do the same flush to my 2001 LS430 as well. Any advice would be appreciated.