I don't know man. me and coolant don't go well. in all my vehicles I've never once changed it, and my Nissan I had I topped it off with the red stuff. (OEM was green) I had this weird looking, brown coolant
never had any issues though
that red stuff in all newer vehicles is "long life" coolant. I haven't seen that green stuff since my 03 Nissan. it really should be changed out after 100,000 or so, give or take. I don't know. buy one of those testers with the ball things in it. I sold my Nissan and a blend of green/red coolant tested good at 110,000
I had an old 86 Pontiac with the green stuff. it tested ok over 100,000 too. that's why I've never changed any.
don't mix the colors like me
someone will tell you the correct answer. it lasts forever though. I just make sure it doesn't get low and I'll test my Jeep's at 100k