Coolant changes & additives
I have a 2000 Honda odyssey, and it has ~90K on it. i'm reading thru the owner's manual and i'm thinking about changing the coolant based on their recommendation of every 30K miles under normal conditions. Except for living in a hot climate (Dallas), normal is mine. i bought it used, and have no idea if/when it was ever changed before. I checked it and it is Green - like the Prestone ethylene glycol i've used for decades.
Do i need to change it? If so, i'm planning on using Prestone coolant. Is my plan ok? would additives help prevent some of the MILD corrosion i've seen over the years in aging vehicles? without causing problems? do modern cooling systems really benefit from additives?