Hence I said and fill it up.
Been using petrol/pariffin mixes for years to get rid of the bloody stuff. It costs more per litre to get shot of it than it does to buy it in the first place. Apart for lead at high doses the burners are fine especially the old ****e which have been used for years and never replaced in scotland.
Raw petrol will go with a bang paraffin/petrol mix is only going to improve your freezing point.