How can I tell how much oil is in my tank?

If your heating oil tank does not have a gauge on it, you will need to follow the steps below to check for the oil level in your tank.

Step 1: Remove the top fill valve cap.

Step 2: Insert a dry straight stick (one long enough to get to the bottom of the tank) until it reaches the bottom. Mark the stick with a pencil where it meets the top of the fill hole.

Step 3: Once you pull the measuring tool out you can compare the oil level to the top and bottom of your tank. For example, a 275 tank is full at 42 inches.

Step 4: Don’t forget to put the top fill cap back on!


  • TriGas & Oil Co, Fuel Oil, Federalsburg, MD