How Long Will My Heating Oil Last?


How long will my heating oil last?  When should I fill my oil tank? 

These are important questions, and the chart below can help you find the answers.

Much like the kind of driving you do affects your car’s gas mileage, the age and condition of your oil furnace, the size of your home, and outside temperatures all affect how much heating oil you will use in a given time frame.

The chart below is based on an average Maryland home, and will help you answer how long will heating oil last. Adjust your estimates accordingly, erring on the side of caution to prevent running out of heating oil.

In addition, we strongly suggest you keep your heating oil level above 30 gallons. The chart below uses 25 gallons for easy conversion to other oil quantities.

Average Outside Temperature (°F) Approximate Gallons Used in 24 Hours Approximate Days 25 Gallons Will Last
15 7.8 3.2
20 7.0 3.6
25 6.2 4.0
30 5.3 4.7
35 4.5 5.6
40 3.7 6.8
45 2.8 8.9
50 2.0 12.5

Is it time for an oil delivery?

If the answer is yes and you live in our MD and PA delivery area, please call Tevis Energy at (410) 876-6800 or use the form on this page to contact us online.  We will serve you promptly!

We offer 24/7 emergency heating oil delivery to new and existing automatic delivery customers!

Tevis Energy customers who choose Automatic Delivery get a $0.05 per gallon discount, AND they never have to ask that dreaded question, How long will my heating oil last? They know Tevis will always deliver when their tank is between 1/4 and 1/3 full.  And if an automatic delivery customer does run out of heating oil, Tevis will deliver heating oil immediately – 24/7 – and give a $50 account credit!

You can trust your heating oil supply to Tevis Energy!

Click here if your oil gauge is broken: How Much Oil is in My Tank?