What your gauge can tell you, what it cannot confirm, and how to talk with our local team about your next order.
If your tank has a visible level gauge, its indicator and markings help you understand the level it is showing.
A gauge reading is not an exact measurement of litres remaining or a promise of how many days your oil will last.
For a standard 910 L heating oil tank, use these approximate amounts from Mercer Fuels as a handy reference. A full reading usually means around 850 L, rather than the tank's entire 910 L capacity.
| Gauge reading | Oil remaining |
|---|---|
| Full | Around 850 L |
| 3/4 | Around 700 L |
| 1/2 | Around 500 L |
| 1/4 | Around 275 L |
| E or 0 | Around 125 L |
| Slightly below E | Out of oil or close to running out |
Tell the office what the gauge shows and when you read it. If you have noticed an unexpected change, mention that too. Do not calculate a guaranteed number of days from a single reading.
Ask Mercer Fuels when to arrange your next order for your home and current delivery schedule. There is no universal ordering level or safe waiting period given in this guide.
If the gauge is hard to read or you are not confident it reflects the oil available, do not rely on it to postpone calling. Explain the uncertainty to the office and ask a qualified technician about equipment concerns. This guide does not diagnose a faulty gauge or explain how to repair it.
If you prefer to place each order, you can order online for routine orders or call Mercer Fuels. Check Tank Reminders can help you remember to check the tank; a reminder does not measure the oil level for you.
Ask about automatic delivery. Mercer Fuels plans your deliveries using usage history and local weather patterns.
Three generations of innovation, reliability, and personal service. Here's what our customers love about our heating oil delivery
That's our guarantee. We monitor your usage and deliver before you need it. If your current service isn't meeting your needs, we're happy to talk through your options.
Supporting local doesn't mean spending more. We offer competitive pricing alongside the reliability and personal service our neighbors value.
Like a personal assistant for your heating! Get weather warnings and delivery reminders to help you remember to order.
Need oil fast? We offer same-day and next-day delivery in many areas. Real local service when you need it most.
When you have a heating emergency, call and speak to a real person any time. Our local staff is here to help.
During heating season, big-screen TVs are given away each month. Every oil order automatically enters you to win. We've given away 60+ TVs. Learn more about the giveaway.
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Share your reading, and any uncertainty about it, with the office. We can talk through your next order.
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