Color is usually good to go on but..............
There are only 3 base types of coolant/corrosion protection
First was silicate and phosphate corrosion inhibitor, usually Green
Used for.........well still used so forever
Needs 2 to 3 year change interval, works just fine as coolant and corrosion prevention
OAT(organic acid technology), Red or Pinkish colors, shouldn't be mixed with above
silicate base.
GMs DEX-COOL is OAT, it is orange
5 year change interval
HOAT(hybrid organic acid technology), uses silicates and OAT, loads of colors, Ford is Yellow/gold, Chrysler did an Orange HOAT, similar color to GM's OAT
Often hyped as life time coolant, but is really 5 year
But here is the thing, I use coolant based on how long I think I will get by without a coolant leak, or have a problem where I will have to drain coolant, lol
So I use silicate GREEN in everything, because I am by nature a pessimist.
I don't mind being happily surprised by making it to the change interval
If you want to use Green and were using OAT or HOAT then drain coolant and refill with distilled water, do a few under miles, NOT in the winter, lol
Drain it and then fill with Green cheap stuff.
The anti-freeze part is either ethylene glycol and propylene glycol and would last forever on it's own, so no change interval for that part.
And water pump lube is also added
They all use these
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