#2 Fuel oil and diesel are all the same but #2 Fuel Oil is designed for off-road heating and the two are different colors. A gallon of Home Heating #2 Fuel Oil generates 137,380 BTU's of energy or compared to our base fuel it has 113% as much energy as a gallon of gasoline. #2 Fuel Oil should not be confused with Biodiesel which is a fuel for diesel cars and trucks; they are different. You can quickly see that #2 Fuel Oil generates a lot of heat when it burns compared to our base fuel / a gallon of gasoline. Tomorrow we will look at Propane.