Holts prestone coolant antifreeze can be mixed with any other colour of coolantantifreeze that is already in your car without causing any problems clogging or damage to the engine it is guaranteed for use with all makestypes of car prestone antifreeze has been developed using engineered technology and tested in the most challenging conditions both hot and cold including the sahara and performs from 37c to 129c it comes as a ready to use formula so you can simply top up as required size 1 litr