I don't think that using used engine oil would be such a good idea, I probably have a couple of hundred liters sitting here, always a pain to get rid of.I did know a bloke who had an oil burning paddle steamer up on the Murray, I think it was called the Iron Maiden, but I haven't seen him for a couple of years. I might have to chase him up again so I can get rid of the oil I have here, that is unless the greenies have tracked him down and put paid to his little steamer.