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[ToyotaToday]

Originally Posted by Tremendous_Slouch

i change mine every two years. I dont use red coolant i use green, probably stupid but i have heard and seen bad things happen with red coolant. (Toyota coolant is expensive and i'd rather flush the system every two years anyway).
I treated my old 1988 Nissan truck like this and it still had the original radiator when i junked her (at 290,000 miles).

I agree with the every two years. That is usually the standard.