2009 Volvo S60 Owner's Manual - Page 188
2009 Volvo S60 Manual
Page 188 highlights
09 Maintenance and servicing 09 Working on your vehicle Changing coolant Normally, the coolant does not need to be changed. If the system must be drained, consult a trained and qualified Volvo service technician. NOTE Do not top off with water only. This reduces the rust-protective and antifreeze qualities of the coolant and has a lower boiling point. It can also cause damage to the cooling system if it should freeze. Top off with Volvo Genuine Coolant/Antifreeze only (a 50/50 mix of water and antifreeze) CAUTION The cooling system must always be kept filled to the correct level. If it is not kept filled, there can be high local temperatures in the engine which could result in damage. Different types of antifreeze/coolant may not be mixed. WARNING Never remove the radiator cap while the engine is warm. Wait until the vehicle cools. 188