How Much Oil Is Left in My Tank? (The Stick Method)

Float gauges fail slowly and lie politely. The stick method takes two minutes and doesn't.

Take a clean, dry stick longer than your tank is deep — a yardstick works for a 275. Remove the fill cap or gauge fitting, lower the stick straight down until it gently touches bottom, hold it vertical for a second, and pull it out. The boundary between wet and dry is your liquid depth.

Now convert inches to gallons with the right chart for your tank and orientation. On a standard 275 vertical, useful anchors are: 8 inches ≈ 65 gallons, 16 inches ≈ 92, 22 inches (half depth) ≈ 134, 31 inches ≈ 197. Our interactive 275V chart gives any reading to the quarter inch.

When should you order? Most suppliers recommend calling at a quarter tank — about 11 inches on a 275 vertical. Below that you risk drawing sediment from the tank bottom into the fuel line, and in cold snaps delivery slots fill up fast.

To know how much to order: gallons to order ≈ fill target − current. If your supplier fills a 275 to 250 gallons and your stick says 90, order about 160. Round down — a delivery that trips the whistle early is annoying for everyone.