How much anti-freeze do I need for my car?

Fiona,

You need to locate your anti freeze/coolant reservoir by opening your car's bonnet and searching for it. Once you've located it, you will see a min/max mark on the reservoir. If the level of antifreeze in the reservoir is below the minimum mark, then top up the fluid so that the new level is between the min/max mark. I always tend to have a little bit below the max mark.