I had a neighbour, who converted a waste oil burner in his shed to run the central heating and boiler in his house. Inventive and cheap to run as it was, it stunk the whole street out. I gave him a litre of castrol R to add to the mix and joy of joys, he has the street addicted.often thought truancy wouldn't be such a problem if they popped a drop in school air conditioning. No help with the candles though.