Which type of oil has the highest energy content among commonly used heating oils?

Heating Oil #2 is recognized for having the highest energy content among the commonly used heating oils. This designation is primarily due to its composition, which includes a significant amount of hydrocarbons that yield more heat per gallon when burned. Heating Oil #2 has a higher BTU (British Thermal Unit) value compared to the other grades, making it more efficient for heating applications.

Furthermore, Heating Oil #2 is the most widely used type of heating oil in residential heating systems. Its well-balanced properties not only optimize combustion efficiency but also enhance the overall performance of heating systems. This makes it a preferred choice for homeowners who prioritize effective heating solutions without excessive consumption of fuel.

The other types of heating oils, while useful for different applications, do not match the energy density of Heating Oil #2. Heating Oil #1, for instance, has a lower energy content due to being more refined and less viscous, while Heating Oils #4 and #6 are typically used in industrial applications where higher viscosity and lower volatility are more advantageous and not necessarily for their energy content.