replying to Tabby, Ukjb wrote:
Oil by nature is flammable, explosive even, as the radiator looses oil the
heating element will be able to heat the available oil to a hotter
temperature, should the thermostat fail and the element be left on to long the
oil could reach boiling point at which the vapours will be volatile, as the
oil is lost natural air will be drawn in to replace the void, the internal
atmosphere will become oxygen rich, this said their would be others signs like
bubbling boiling noises, smell of the hot oil being burned off into the air
long before the risk of fire, if the radiator is leaking get rid of it and buy
a new one they are not expensive.

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