The affordability of heating oil makes it a popular fuel source for many homeowners during the winter months. Since it's often bought in bulk and stored in an on-site tank, it's possible to end up with some unused portion at the end of the season and if not properly stored, could eventually cause future problems.  If you've ended up with a surplus, here's what you need to know about using it. 

How Long Does Home Heating Oil Last?

Generally, unused Heating Oil stays good for anywhere between 18 and 24 months. As such, leftover heating oil is expected to last through the following winter. However, the life span is drastically impacted if it becomes contaminated. 

A common cause of oil going bad is bacteria. While microorganisms are always present in the viscous liquid, they begin breaking it down faster when combined with other elements. For example, exposure to water quickens the bacterial action, as does rust and sludge buildup in the tank. 

To get the most out of your home heating oil, you need to prevent it from coming into contact with these contaminants. The tank and lines should be inspected at least once a year to identify potential issues that could impact the quality of the fuel, such as points of moisture entry. 

How Can You Tell if It's Bad?

While it's not always obvious, there are ways to tell that oil has spoiled. Odor is the most common sign. 

When the bacteria begin breaking down the substance, the process creates a sludge that releases a foul smell. Such an unpleasant scent is obvious when opening the lid of an aboveground tank or the filter at the furnace. 

Once heating oil has gone bad, it still burns but doesn't provide the same energy level. As a result, you may notice your system producing less heat. When severe contamination is present, the lack of power can even cause the furnace to turn off. 

Additionally, the presence of rust on the exterior of a tank may indicate issues inside. If any of these signs occur, contact a professional to inspect the oil and the condition of the system. 

If you're looking for a reliable supply of home heating oil, Bradigan's Incorporated provides fuel delivery to residents across Armstrong County, PA, and the surrounding counties. The company offers a wide selection of products to fuel your heating system or vehicle. Schedule a home heating oil delivery online or by calling (724) 548-7654.