What type of coolant to use?

Hey Keith, thanks for replying.

So I can use FL22 Mazda Coolant even if my car doesn’t have the FL22 marked on the cap?

I was curious about the different coolant colors and thought of doing a google search about it. I read some people said you can’t mix colors and some were saying that you should never mix regular coolant with DEXCOOL. So there is a lot more about coolant than I initially thought.

When I replaced the water pump on my Mazda 6 I bought the cheapest coolant from Oreilly thinking it would be okay since the manual didn’t say much other than the capacity. If I remember correctly, the car had green coolant, or maybe not, because it was leaking so badly that there was hardly any coolant in it. My brother just used plain water since it was leaking fast. So I just bought a 50/50 that turned out to be green too.