What is the coolant capacity of a 1991 Mercury Topaz and is the red or green coolant recommended?

Answer 1

It originally came with green coolant. It is critical that you know what kind of antifreeze your car takes. There are 2 general kinds. Long life and traditional Green coolant. The sensors base data on the correct chemical composition of the one that was originally installed in it. Therefore adding wrong one may cause the ecm to adjust the fuel mixture incorrectly or cause sensor damage. Some vehicles require different long life coolants- GM has Dex-cool, Ford just came out with another, Honda has their own. If the concentration is too great or too weak, it will not work correct. The original coolant in that car was "green coolant". This old style antifreeze should never be mixed with the newer long life coolant, unless it is a "universal" or "global" coolant that is supposedly compatible with both. The coolant capacity is in your owners manual, usually in the "servicing your vehicle" section. And as for the color. Read the temp ratings on the antifreeze bottles, and use whichever you need according to your climate. Be sure to keep in mind the difference between pure antifreeze, and prediluted (50/50 or half water, half antifreeze).