Maintenance & Reliability worked example

Lubrication Consumption with lubricant application rate of 0.4 L / hr: a worked example

Suppose lubricant application rate falls to 0.4 L / hr. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate lubricant cost from application rate, runtime, and lubricant unit cost.

The inputs for this scenario

  • Lubricant application rate: 0.4 L / hr (the input this scenario stresses; the baseline uses 0.8)
  • Runtime in period: 4,500 hr (held at the documented default)
  • Lubricant unit cost: 6.5 $ / L (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Lubricant used = lubricant application rate × runtime in period.
  • Lubrication Cost works out to 11,700 $ / period at these inputs, and this is the headline figure for the scenario.
  • Lubricant Used works out to 1,800 L at these inputs.
  • Lubrication Runtime works out to 4,500 hr at these inputs.
  • Lubricant Unit Cost works out to 6.5 $ / unit at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where lubricant application rate sits at 0.8 L / hr and the headline result is 23,400 $ / period, this scenario comes in 50% below the baseline at 11,700 $ / period.
  • It multiplies application rate by runtime to get lubricant volume consumed, then multiplies by unit cost to get total lubrication cost for the period. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Lubrication Cost: 11,700 $ / period (headline result)
  • Lubricant Used: 1,800 L
  • Lubrication Runtime: 4,500 hr
  • Lubricant Unit Cost: 6.5 $ / unit

Run it with your numbers

  • To rerun this with your own numbers, open the live Lubrication Consumption calculator, set lubricant application rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.