Reply To: Ethanol in Petrol, engine coolant and tyre pressures

[Roger GrixParticipant]

Hi Bernie,

You are absolutely correct.  below is the response from Citroen Classics:

Hi Roger,

The summer and winter protection figures quoted on the label are with a 15psi cap. They be much the same for other types of coolant running with a 15psi cap.
In the unpressurised system of a Traction the boiling temperature of the coolant will be lower than a pressurised system, but with PG coolant it is still much the same as EG coolant.
We are running it in plenty of cars, pressurised and unpressurised, without any problems.

The main advantage of PG coolant is it’s low toxicity and the fact that we have bottles of inhibitor package top up, enabling a very long coolant life. The coolant does not lose it’s antifreeze properties (unless diluted further with water), but the corrosion inhibitor chemicals “wear out” with time, so we have concentrated inhibitor chemicals in small bottles to replenish the coolant inhibitor level from time to time.

Kind Regards,
Darrin Brownhill