If you aren’t sure where the coolant reservoir is you can look for your vehicle’s manual or you can search on the internet for the make and model of your vehicle.
When I checked my antifreeze level on my coolant reservoir it was pretty low. Pictured at the left is a blue line where my antifreeze level was and the arrow shows where the level was supposed to be. You should check the antifreeze level when the vehicle is cold and add the fluid when it’s cold.
When I did a search for my car it brought up pictures of what the reservoir looks like. The cap on the coolant reservoir usually has a picture indicating it is the coolant reservoir
One of the articles I read on the internet talked about how important it is to get the right mixture of water and antifreeze. The article taught how to buy a tool to test the mixture. (This method is more difficult)
My nephew, who is a mechanic, told me to just go to the automotive store and ask the employees to help me find the premixed antifreeze. Every vehicle has different requirements. The Automotive shop should be able to look up the required antifreeze for your car. The information can also be found in the vehicle owner’s manual.
Do not mix different colors or types of coolant in your vehicle. Make sure the correct coolant is used. Mixing of engine coolants may harm your engine’s cooling system. The use of an improper coolant may harm engine and cooling system components and may void the warranty.
The Owner’s manual has a section on the coolant Maintenance and Specifications for the engine. As an example I have pasted the specifications for my Auto (A Ford Escape)
It is helpful to use a funnel when pouring the antifreeze into the coolant reservoir. Fill to the cold fill level.
For all other vehicles, which have a coolant degas system with a pressurized cap, follow the directions in the owner’s manual.
Helpful article about coolant antifreeze