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  • how much heating oil is in my tank

How Much Heating Oil is in My Tank

“How much heating oil is in my tank?” If you’re a will-call oil consumer, it’s an answer you need to know!  The helpful charts below will help get the answers you need!

The most common oil tank holds 275 gallons of heating oil. With this in mind, use the gauge on your tank and the chart below to estimate how many gallons of heating oil are in your tank.

Tank Gauge Reading Gallons Remaining Approximate
Full 275
7/8 241
3/4 206
5/8 172
1/2 138
3/8 103
1/4 69
7/8 34


But what if your oil tank gauge is broken? Can you still tell how much heating oil you have?  Yes, you can still get a accurate reading of your heating oil level by measuring the depth of the oil in your tank. This requires a vertical fill pipe and a long, clean measuring stick or dowel. Lower the stick into your tank until it gently touches the bottom. Remove the stick from the tank and note how many inches up the stick the oil reached. Then use the chart below to convert inches into gallons.

Make sure the stick is as long as your tank is deep, plus the length of your fill pipe, plus another 12 inches or so. (You do not want the stick to fall into your tank!)

The majority of aboveground oil tanks in Maryland are 275 gallons and measure 60″ long x 27″ wide x 44″ deep. If your tank measures differently, please call us and we will be happy to help you identify the size of your tank.

After determining how much oil you have, refer to our blog post How Long Will My Heating Oil Last. If you would like a delivery, please call us or click Request Pricing Now.

275 gallon (44″ depth) 550 gallon (49″ depth)
Oil depth Gallons Remaining Gallons Remaining
1″ 3 3
2″ 8 7
3″ 15 14
4″ 23 21
5″ 32 23
6″ 42 28
7″ 53 48
8″ 63 58
9″ 74 69
10″ 86 81
11″ 98 92
12″ 110 104
13″ 122 117
14″ 135 129
15″ 148 143
16″ 160 156
17″ 172 169
18″ 184 183
19″ 196 197
20″ 207 211
21″ 217 225
22″ 228 239
23″ 246 254
24″ 255 268
25″ 264 283
26″ 270 297
27″ 275 312
28″ 326
29″ 340
30″ 354
31″ 368
32″ 382
33″ 395
34″ 408
35″ 422
36″ 434
37″ 447
38″ 459
39″ 470
40″ 482
41″ 493
42″ 503
43″ 513
44″ 522
45″ 530
46″ 537
47″ 544
48″ 548
49″ 550

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  • how long will my heating oil last

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 charts 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

Do you need to know: How Much Oil is in My Tank? Click the link for the answers you need!

If you need a heating oil delivery, please call us or Contact Us online. In a pinch, you can also use diesel or kerosene instead of heating oil to hold you until delivery can be made. If you use diesel or kerosene, please be sure to purchase these products from a reputable gas station.

Not only do customers who choose Automatic Delivery get a $0.05 per gallon discount, they never have to ask how long will my heating oil last, because they know Tevis will deliver when their tank is between 1/4 and 1/3 full. And if you do run out of heating oil, we will deliver heating oil to you immediately 24/7 and credit your account $50!

Trust your heating oil supply to Tevis Energy: Family owned and operated in Maryland and Pennsylvania since 1932.

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  • heat oil tank sizes

What size is my oil tank? How much oil can my tank hold?

Our customer service team is frequently asked how to determine the size and the capacity of their home heating oil tank. And it is a good question!

Maybe you have recently moved into your home or have not thought about heat oil delivery in months and have just forgotten. Knowing the size of your home heat oil tank is important stuff – as it is the key in keeping your home and family warm during cold weather months. And if the tank does not have a gauge, the size of the oil tank is vital information to determine the amount of heating fuel remaining in the tank.

The amount of oil a tank can hold is measured in gallons. The most common size oil tank for a home is 275 gallons.

• Determining the size of the oil tank and the amount of oil in the tank is relatively easy. Measure the width, height and depth of your oil tank. tank-size-chart_te, determine your oil tank size. At the bottom of each column is the total the tank size can hold. In the 275 and 330 tank sizes they are manufactured either tall (H) or wide (V).

• To figure out the oil level of the tank you will need a long, clean measuring tape, stick or pole.
Stick a measuring stick into the tank and measure the number of inches of oil in your tank, this is similar to the process of checking the oil level in your vehicle. Again, tank-size-chart_te, look at inches column on the far left and compare with your tank size to determine the amount of oil in your tank.

For example: A tank that measures 27”W X 44”L X 60”D is a 275 gallon tall tank. A pole inserted shows 11” of oil remaining in the tank. This means the tank has 108 gallons remaining.

The size of your oil tank is needed to place a heat oil order and to ensure a smooth delivery. If you are still uncertain about the size of your oil tank, or the amount of remain oil in the tank, contact Tevis Energy (410)876-6800 and one of our customer care representatives will be happy to assist you!

Automatic Delivery is a good option to reduce the concerns of when or how much heating fuel to order. You don’t need to worry about how much heating oil you have and whether it will arrive during severe weather events.

Related Blogs:

Will My Heating Oil Last Me Through Winter?
Locked-in Heat Oil Prices – Too Good To Be True? Probably

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  • spring tank fill

End the season with a full tank of heating oil?

Yes! And not because we want you to buy more oil than you need, but because it helps protect your tank and heating oil system over the summer. Here’s why.


As outside temperatures warm up, oil tanks experience greater temperature fluctuations which will pull moisture from any air inside your oil tank and cause condensation to accumulate on its inside walls. Of course, the more oil there is in your tank, the less surface area there is inside for condensation to form! Unshaded outside tanks that take on direct sunlight are especially prone to condensation.

Why is condensation bad? Condensation is water, and because it’s denser than heating oil, it settles to the bottom of your tank. There, tiny micro-organisms that always seem find their way into everything, even heating oil tanks, begin to breed. These organisms live in the water, and as they multiply and die off, they create sediment which can build up and clog fuel lines and the burner nozzle. At the very least, this will cause the system to operate inefficiently. At the very worst, it can even cause your heating system to fail. A repair bill usually comes along soon after. Not good.

As if that’s not bad enough, sediment also has a corrosive effect on a fuel oil tank. The sediment, still containing water, causes the tank to rust from the inside out. This can seriously weaken your tank. Considering that one gallon of heating oil weighs approximately 7 pounds, a 150-gallon delivery weighs over 1,000 pounds! Why take the risk? An extra heating oil delivery at the end of the season is worth the cost to help minimize condensation and the damaging corrosion it can cause. And with the ECOPlus additive that Tevis Energy mixes into its heating oil, the fuel oil will still be as good the following season as the day it was delivered.


Whether it’s low sulphur heating oil or BIOHEAT™ renewable heating oil, Tevis buys only the highest quality heating oil, and then improves it by fortifying every gallon with a product called ECOPlus, which works to protect your system and tank. And it produces MORE heat with LESS oil, and FEWER emissions! How does it protect your system? It’s a fuel stabilizer that helps the oil last longer and give great performance, no matter how long it has been in the tank. It disperses condensation and also acts as a detergent that helps keep your burner nozzle clean. And a clean nozzle produces cleaner and more efficient combustion. And because our fortifier has been improved over the years, we have given it a Watch our fuel quality video and check out the benefits!


Now that you know the dangers of condensation build-up in less than full oil tanks, you also know that a healthy tank is an important part of your heating system. Tevis service techs inspect basement and aboveground tanks during your annual tune-up. Tevis oil drivers also keep a watchful eye when delivering to tanks they can see. And while you can count on Tevis to let you know if we see signs that your tank is weakening, we also know that once that process begins, a tank can quickly become unusable.

So, if it’s time to replace your heating oil tank, NOW is a great time to take a proactive approach to oil tank replacement. NORA (National Oilheat Research Alliance) is offering a $250 rebate on oil tank replacements, starting March 1, 2016. This rebate is being offered to heating oil consumers in Maryland and Delaware on a first-come first-served basis until all of the funds have been exhausted. It’s difficult to find information about this program online, so please contact-us if you need to be referred to a company that can replace your heating oil tank.

Now is also a great time for your end of season heating oil fill-up. Prevent tank corrosion and sediment build-up for a more efficient, longer lasting heating system. Besides, home heating oil prices are very cheap right now!

Honest. Loyal. Local.

Tevis Energy is the company thousands of MD and PA homeowners TRUST for home heating oil delivery in Baltimore, Carroll, and Howard Counties, and neighbor communities in Southern Pennsylvania. Locally-owned and always competitively priced, Tevis Energy provides the most reliable heating oil delivery in the Baltimore Maryland region. Tevis Energy’s high-efficiency heating oil and BIOHEAT® renewable heating oil burn even cleaner to give you more heat with less oil, saving as much as 9% on your heating costs


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  • do i smell oil

Sniff, Sniff. Do I Smell Oil?

If you have an oil heated home, you may smell oil from time-to-time. Here’s what the heating oil experts at Tevis Energy have to say.

First the good news! Home heating oil fumes are non-toxic and pose very little immediate risk to your family and home. Heating oil is biodegradable, contains no carcinogens and is extremely stable. In fact, heating oil will only ignite when heated to 410 degrees and atomized into a vapor inside a combustion chamber. And although, the smell of heating oil can be unpleasant, the level of urgency is nothing like that when the odor of gas is present. Home heating oil is one of the safest fuels available and a wise choice for your home.

Now that we’ve addressed some of the greatest concerns, there are some other things you should know if you smell heating oil:

  1. You may smell heating oil the first time you turn your system on for the season. If everything is operating correctly, the odor should dissipate quickly.
  2. If the odor persists, it could be that your system is not operating efficiently. For example, the nozzle, which converts heating oil into vapor may be clogged, preventing an optimal spray pattern. The oil that doesn’t combust fully will often cause an odor. While this is the most common reason you may smell heating oil, there are other causes. Call our experts at Modern Comfort Systems as soon as possible to identify and correct the problem.
    Additionally, to help combat this problem, Tevis Energy fortifies its heating oil and Bioheat renewable heating oil with a product called T2000. This product keeps your fuel lines and nozzle flowing freely, which promotes greater fuel efficiency, better system performance, and fewer heating oil service calls! As a result, you get more heat with less oil! View our fuel quality video for a demonstration of our fuel quality and composition.
  3. Depending on the age of your tank, it’s possible that oil could be leaking from your tank or along the lines and fittings. Look for oil stains under your tank. If you see any, do not touch the tank, as this can cause additional problems. Call Modern Comfort Systems
  4. While it is very unusual for this to occur, if you detect smoke inside your home while the system is operating, immediately shut down the furnace using the oil burner switch that is often at the top of basement stairs or several feet from the system.
  5. And even though the dangers of carbon monoxide are much lower in a home with an oil heat system than in those heated by a gas furnace, $20 spent on a CO detector from your local hardware store is always a good idea for peace of mind.
  6. An ounce of prevention is worth a pound of cure! Tevis recommends that your heating oil system inspected and tuned-up every year by Modern Comfort Systems. Our Total Care heating oil service plan is a great investment because it includes your annual tune-up and covers 100% of most repair costs. Contact us for details!

Locally-owned and always competitively priced, Tevis Energy is the company thousands of homeowners TRUST for their home heating oil delivery in Baltimore County MD, Carroll County MD, Howard County MD, as well as Adams County PA and York County PA.


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  • Lock in oil rate

Lock-In Heating Oil Price: Too Good to Be True? Probably.

Don’t be lured by a lock-in rate.

There are three common types of home heating oil pricing options: market price, capped price and lock-in heating oil rate.
• Market price- your heating oil price fluctuates with the market.
• Lock-in price-your heating oil price is fixed for an entire season regardless of market price.
• Capped price– offers the “best of both worlds” because your heating oil price fluctuates with the market but will not exceed your capped price.

When you join capped price program, there are no unpleasant surprises about fuel costs. You will never pay more per gallon than the capped priced you sign up under. If the prices rise above your capped price, you still pay the capped price. And, if the daily market price is below your capped price when you receive a delivery, you will pay the lower price. Having a capped rate is a win-win situation because no matter how the market fluctuates, you always pay the lowest price. This knowledge helps you budget fuel costs and gives you peace of mind.

A lock-in heating oil price is similar to a capped price in that you will not pay more than the price you are locked into for the season. But you will never pay less than your lock-in price either… even if market price falls. With a heating oil lock-in rate, if daily market price goes down, your locked-in price does not. Lock-in heating oil rates also come with a one-year contract and fee. If for any reason the contract is broken due to poor service or a bad pricing deal, the customer has to still pay the fee. For this reason, Tevis does not offer a locked-in heating oil price, and recommends that consumers avoid them!

We Help You Control Heating Costs

One of the best ways we can help you control home heating costs is through our TLC Protection Program.

What is TLC Protection?

TLC Price Protection is an optional program that offers peace of mind during price volatility. If our market price is higher that your capped price, you ONLY pay the capped price! If our market price is lower than your cap, you pay the lower market price! Tevis suggests that oil consumers avoid fixed or “locked” heating prices, which obligate you to one price all season, regardless of the market price.

Additional Ways Tevis Energy Customers Save Money and Budget Fuel Costs:

Monthly Payment Option – Instead of paying per delivery, most customers prefer our monthly payment option. This method of payment eliminates high delivery bills and spreads your estimated fuel costs into lower monthly payments. This option also pays you 1% interest on credit balances you accumulate during the season and can be customized to meet your needs. Enrollment is completely free.

Customer Referrals – One of the best ways to lower your heating cost remains our customer referral program. When someone you refer becomes a new automatic delivery oil or propane customer (250-gallon tank or larger) you and they will each receive a $50 account credit!

Our family-owned company is honored to be the heating oil supplier of choice for thousands of families in Maryland and Pennsylvania who trust Tevis to keep their homes comfortable all year long! In addition to heating oil delivery, Tevis Energy and its sister companies, Tevis Propane and Modern Comfort Systems, are proud to offer you a complete range of home comfort solutions that are designed to make your home comfort convenient and affordable! For questions about your current account or to become a Tevis Energy customer, contact Customer Service (410) 876-6800 or visit www.TevisEnergy.com

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  • wet hosing

What is wet-hosing?

Wet-hosing, also known as: Fleet fueling, direct fueling or mobile on-site fueling, is when a fuel transport vehicle pumps directly from one tank into another. Most typically this is done with large scale construction site equipment and farming/agricultural machinery.

Direct fueling of large scale and heavy equipment is not something we think of until we actually have to do it. How often do you see a front end loader or crane being fueled at your local gas station? More than likely, you probably haven’t.

Bulk fuel transport companies, such as Tevis Energy, have tankers of all sizes that deliver to private fuel tanks on farms and businesses property, allowing for a private gas station to fuel the fleet. Wet-hosing on-site equipment means the fuel is delivered directly from the transport tanker into the heavy machinery or large storage tanks on private property. Direct fueling to heavy machinery and private storage tanks saves time and money.

Benefits of wet-hosing include:
• Fuel inventory control: Direct Fueling greatly reduces the possibility of theft of product.
• Convenience: Fuel is delivered directly to the machinery in need.
• Increased productivity: Eliminates the need to stop for fuel during work hours.
• Environmentally conscious: Reduces insurance concerns associated with on-site fueling tanks.

Tevis has the experience, equipment and resources to meet your company’s unique fueling needs. We are a large scale fuel transport company, serving central Maryland (from east Baltimore to eastern Frederick Counties) and southern Pennsylvania (Adams and York counties). Our fuel delivery services include job site wet-hosing for large scale equipment on farms and construction sites, and fuel transport for businesses with private fueling pumps (10,000 gallons or more).

Click here to learn more about Tevis Energy’s agricultural and commercial fueling services.

Thinking on Energy

Related Articles:
Discount vs. Full Service Oil Company: What’s the difference?
Lock-In Heating Oil Price: Too Good to Be True? Probably.
How to choose a heating fuel supplier: Five things to consider.

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  • Five Fuel Supplier Questions

How to choose a heating fuel supplier: Five things to consider.

We receive call inquiries almost every day from prospective customers who need to choose a new heating fuel supplier. One of the most frequently asked question that we answer is: “Do you have the lowest price on home heating oil?” We understand that a low fuel price is important to our customers and do our best to control our costs, keep our prices down while providing the best quality oil in the region.

Home heating oil price is not the only factor to consider when choosing a heating fuel supplier. In Maryland and Pennsylvania, there are hundreds of home heating oil and fuel suppliers to choose from. Here are five things to consider before settling on one.

1) What is the Company’s Reputation?

Before choosing a heating oil supplier, do your homework. A little investigation and a few phone calls go a long way in locating a reputable and reliable company!

Online forums are a great place to gain insight on how customers feel about the service they receive. Check and verify the company’s profile: Read reviews and ratings.

Tevis Energy takes great strides and great pride in providing top notch customer service from a customer’s incoming inquiry call through to fuel delivery, we want our customers to feel valued! It is our company’s core belief to ensure customer satisfaction. We understand that without our customers, we would not exist. We welcome feedback and appreciate every opportunity we have to serve our customers!

2) What fuels are used and are they environmentally friendly?

Today’s clean-burning heating fuels offers many advantages! Look for a company that offers quality fuels, because the fuel oil will last longer and produce fewer emissions.

EcoPlus is in our standard heating oil. We fortify every gallon of heating oil we deliver with ECOPlus, an additive that dissolves impurities that occur naturally inside your tank. If allowed to accumulate, these impurities cause your system to run poorly. With ECOPlus, not only will your system use less heating oil and produce fewer emissions, used consistently, ECOPlus reduces system wear and tear, and helps lengthen system life. We provide ECOPlus at no additional cost to you!

In addition to bringing our customers high grade environmentally friendly fuels, Tevis Energy encourages our employees to conserve resources and recycle — right down to the paper shredded in our offices, which is donated to local farmers and the local humane societies as animal bedding.

3) What services are available to customers?

Strong customer service representatives and 24-hour emergency service are a must! No one should be left out in the cold wondering and waiting until the next business day for an answer from their energy provider.

Strong consideration should also be given to the availability of affordable annual service and maintenance contracts.

At Tevis, customer service is practiced on both internal and external levels. Our employee culture is one of attentive, patient people who genuinely care about our customers and each other! As Tevis has grown and expanded in the region, have been with our companies and grown into their positions and are cross trained in a multitude of positions, therefore having strong product knowledge.

We offer 24-7 emergency heating oil delivery service to our customers. We are so confident about our Automatic Oil Delivery Service, that if a customer runs out of oil, we will make an immediate delivery, light the burner at no charge and credit our customers account $50! (The Tevis Energy monitored emergency number is 410-876-6800)

Modern Comfort Systems, a member of the Tevis Family of Companies, offers affordable service plans for all your comfort and energy needs including: Oil, propane, natural gas, electric (including heat pumps) geothermal, ductless systems, indoor air quality purification and central air conditioning.

4) Does the heating oil supplier offer a variety of payment plans?

Let’s face it. Sometimes paying the bills can be hard! Be certain to choose a local fuel supplier that understands your budget scheduling needs and is fair and above board in its billing practices. Click here to learn more about flexible heating plans.

Tevis Energy want to keep your home and office comfortable year round in as many ways as possible. We offer three payment plans each designed to meet your needs as well as a competitive referral program for our customers!

Tevis does not offer a locked-in heating oil price and recommends that consumers avoid them!

5) What is the company’s investment to your community?

Do not overlook a company’s history and stake in the community! You want a local heating oil company with deep ties in the community where you live, work and play. Some companies will claim to be local, and while they may have an office in your community, the decisions made that affect your surroundings come from corporation executives that live hundreds, even thousands of miles away. Corporations that outsource are not as invested to their communities as local owned and operated companies and are more likely to change ownership.

Founded in 1932, The Tevis Family of Companies is headquartered in Westminster, Maryland, with offices throughout Central Maryland and in Littlestown, Pennsylvania. Our customers are also our employees. The word “Family” in our branding is no mistake: Our family of companies employs your family members, neighbors and friends! We live local and support local businesses and organizations throughout central Maryland and southern Pennsylvania!

In addition to fund raisers, volunteer work and donations to a variety of local charities, we participate in heating oil to programs such as LIHEAP (Pennsylvania) MEAP (Maryland) and Citizens Energy.

For more information about Tevis Energy, its sister companies and new customer inquiries please call us (410) 876-6800 in Maryland and (717) 632-3400 in Pennsylvania.

Related Links:
A Local Company Shares Your Values
Discount vs. Full Service Oil Company: What’s the difference?
A Lock-In Heating Oil Price: Too Good to Be True? Probably.
Pennsylvania Alternative and Clean Energy Program (ACE)
Energy Assistance
Renewable Energy Tax Credit Application:
Maryland Clean Energy Center
Maryland Energy Administration

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