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Heating oil produces 138,500 British thermal units per US gallon (38.6 MJ/l) and weighs 8.2 pounds per US gallon (0.95 kg/l). Number 2 fuel oil has a flash point of 52 Â°C (126 Â°F). Most heating oil products are chemically very similar to diesel fuel used as motor fuel.
According to EIA historical data , from October 2012 to March 2013 the average price per gallon for residential heating oil varied from $3.969-$4.175, or about $910-$1,000 to refill a 275-gallon tank and $1,850-$2,100 for a 550-gallon tank; and 10 years ago, from October 2003 to March 2004, the average was $1.344-$1.625 a gallon.