It’s currently July 2024, which means that we’re starting to wind down on heating oil usage. Even if you aren’t burning oil, it’s still a good idea to plan for when you need to order oil. It’s also important to know how long a filled tank will last you, even in the summer. Especially if you use heating oil for hot water, in which you’ll always be thinking about heating oil! In this blog post, I’ll be covering how long a full tank of oil will last you!
Tank Size
The most common and obvious factor when it comes to how long a full tank will last you is based on your tank size. Typically, the most common tank size used today is 275-gallon tanks. Despite having a tank capacity of 275 gallons, these takes will usually have a maximum capacity of 250-260 gallons. This is because oil dealers will normally leave the top couple of inches free for airflow. Oil dealers will do this to prevent overflow and risk of leaks. Aside from 275-gallon tanks, 330-gallon tanks are the next most common size.
While not uncommon, sometimes homeowners will have a ‘twin tank’ system. This is when two tanks (usually of the same size) are linked together. This effectively doubles the capacity for how much oil you can store and burn before needing to get more. These tanks will usually have a crossover pipe on the bottom of the two tanks that connect the two which will allow for equalization.
If you have an underground tank, you’ll usually have about 500 gallons as your capacity. However, sometimes, they can get as big as 1000 gallons or even 2000 gallons! These tank setups are pretty rare because they are normally removed after 30 years or so when these tanks tend to start eroding. If you are deciding to remove your underground tank, we cover everything you need to know about that here.
House Size Will Affect Usage
After you’ve gotten your tank size, you’ll want to know how much oil your home will require daily. This will then help us determine how long a full tank of heating oil will last you. The following factors will be your biggest impactors on how much heating oil you burn daily:
- House Size: With a home that’s 1500 square feet, you might see yourself burning around 500 gallons yearly. However, a 3500-square-foot home will probably use well over 1500 gallons per year.
- Energy Efficiency in your Home: Usually a 2500 square foot home that’s well insulated will only use an average of 600 gallons of oil per year. However, a house of the same size that is poorly insulated can use upwards of 1200 gallons per year! Ensuring that you have a well-insulated home is important to keep your home warm and your usage low!
- Heating System Age: If your heating oil system is well maintained, then it will last longer than most other heating oil systems! Well-maintained systems can last for 30 years or longer! While this does sound great, technology will continue to improve as the years go on to make these systems more efficient. For example, upgrading to a new oil-fired heating system can ultimately reduce your heating costs by up to 30%.
- Interior and Exterior Temperature: Turning down the temperature of your thermostat will reduce the amount of heating oil that you’re burning. But, that isn’t the only contributing factor when it comes to burning oil. The exterior temperature plays a huge role in burning oil. The temperature outside will ultimately determine how much oil you’re burning. On a 10-degree day, you might end up using anywhere from 8-12 gallons! But on a day that’s 30 degrees, you’ll probably only use about 5-7 gallons of heating oil.
Daily Heating Oil Usage
After finding out your tank size, you can use the below chart to determine how much heating oil you’ll use daily. Using this, you can estimate how long a tank of heating oil is going to last you.
But, keep in mind that you don’t want to wait until your tank is empty! Always be sure to order heating oil when your tank is below 1/4! Or as we say it, “Order at a Quarter”!
How Long Until You Need to Order Oil?
The point at which you’ll need to reorder oil will depend on the size of your tank and your consumption. Just like with your car, it’s important to not let your tank run empty. This will cause damage to your heating oil system and which will cause your burner to shut down. This can also cause sludge to get sucked into the feedlines which will clog your system.
As mentioned previously, you should order oil when your tank is 1/4 full.
On a tank that’s 275 gallons, the 1/4 mark is roughly 68 gallons. Because a 275-gallon tank can only hold a maximum capacity of 250-260 gallons when it’s full, this will usually mean that you’ll have 182 gallons of oil to burn through before you should order more. You can use the above table to determine your average heating oil usage. By doing a little bit of math, you can get the total number of usable gallons. For example:
- Size of Home: 2500 Square Feet
- Average Temperature Since Previous Fill Up: 30 Degrees Fahrenheit
- Average Daily Usage (30 Degrees Outside): 5.2 Gallons Per Day
- Tank Capacity: 275 Gallons (True Capacity 250 Gallons)
- Point of Reorder: 1/4 Tank or 68 Gallons
- Gallons Before Next Reorder: 250-68 = 182 gallons
- Days Between Fills: 182/5.2 gallons/day = 35 Days
When the outdoor temperature is around 30 degrees Fahrenheit, a 275-gallon tank that’s heating a 2500-square-foot home, will last around 35 days between fills!
When Should You Check Your Healing Oil Tank to Order Oil?
It’s important to check your oil intake often so that you don’t wake up to a cold house in the middle of the night during the winter (trust me it’s not fun). If you did run out of heating oil, then it is best to take a look at this article here for steps on what to do.
Usually with an old-fashioned float gauge, we recommend checking the tank at least once a week or at the very least, every two weeks. You can periodically set a reminder on your phone to alert you when it’s time to go down to check the tank every so often.
However, if you have a Smart Oil Gauge, then you can check your tank whenever and wherever! With the use of the Smart Oil Gauge, you can monitor your tank level and usage just by having the app installed! The app keeps track of usage data and your oil level so you’ll have everything you need in the palm of your hand!
But, if you’re still new to heating oil and are curious about how much heating oil you might be burning, take a look at the below chart to gauge your expected use for the winter!
Conclusion
When your tank reaches 1/4 or below, it’s time to order oil. To check for the lowest prices available, check our FuelSnap website! This will give you the ability to shop around using local dealers in your area and get the lowest price possible for you! You’re able to choose exactly how many gallons you want and decide between local dealers! But be sure to check your tank frequently so you know when it’s time to order!
The amount of oil that you burn will depend on your home size as well as how well-insulated your home is. If your home is very well insulated then you will see yourself burning less oil in the long term. Meanwhile, if your home is not well insulated you will end up burning more oil in the long term.
Tank size is another important factor as it will also determine how much oil you will need to burn before you need to get a fill-up. If you have a 275-gallon tank, you’ll often have to burn through 182 gallons before it’s time for a fill-up.
Happy Heating!
Hunter
