Honestly, I'm not sure. In the 90s it was easy because almost all cars ran on green silicated IAT (Inorganic Additive Technology). With modern cars it seems the safest bet would be to use what the casa sells. But with CVT's experience it seems even they switch out their coolant for whatever is available. I've also experienced this across different makes of cars.
This link shows a table of the different coolant types:
Engine Coolant – Choosing the Right Type for Your Car | Valvoline[emoji769]
Despite the color coding on Valvoline's website, color can't be used as a guide anymore as it won't tell you if it is ethylene glycol or propylene glycol based, has silicates, phosphates, 2eha, etc. And other brands use different colors across their range.
I'm interested in using Peak Global Lifetime coolant because:
1. It is a HOAT coolant (Hybrid Organic Acid Technology) that is ethylene glycol based but silicate, 2EHA and phosphate free.
2. It is an extended life coolant. They even claim it can be left in the car for the rest of its life.
3. Said to be compatible with all the other types of coolant. This is important for me as traces of the old coolant may still linger despite flushing.