I would also like the answer to this question, as not ALL radiators do come with oil....
Thank you
Vicki
Vicki, February 2009
why do you need oil ?these heaters should be sealed when they get HOT they are NOT burning the oil inside it uses a heater type of element to heat the internal oil along with a thermostat switch .
wirecutterman, February 2009
edit
I can answer this question...
Where do you get oil for an oil filled radiator, would any light oil do?