Adding coolant/anti-freeze (brand)

[babyduke]

Just to clarify my question, would it be bad to use another brand now since it'll be mixed with the original?

[Joshdub]

Originally Posted by babyduke

Just to clarify my question, would it be bad to use another brand now since it'll be mixed with the original?

Mixing different coolant solutions can cause clumping, or something along those lines. I'll let someone more chemically versed go into more detail. You need to find out the chemical make up of the coolant before you mix with other brands.