How many gallons of antifreeze does it take to fill up?

The amount of antifreeze required to fill a vehicle's cooling system varies by make and model, but most passenger vehicles typically need between 1.5 to 2.5 gallons. Larger vehicles, such as trucks or SUVs, may require up to 3 gallons or more. It's important to consult the owner's manual for the specific capacity of your vehicle's cooling system. Additionally, most antifreeze is mixed with water, usually in a 50:50 ratio, so consider that when calculating total volume.