Maintenance & Reliability worked example

Lubrication Consumption with lubricant application rate of 2 L / hr: a worked example

What does the result look like when lubricant application rate reaches 2 L / hr? The full calculation is worked below with real intermediate numbers. Use it when budgeting lubrication routes, comparing grease or oil options, or quantifying over-lubrication cost.

The inputs for this scenario

  • Lubricant application rate: 2 L / hr (raised for this scenario; the documented default is 0.8)
  • Runtime in period: 4,500 hr (unchanged)
  • Lubricant unit cost: 6.5 $ / L (unchanged)

Working through the calculation

  • Applying the documented formula (Lubricant used = lubricant application rate × runtime in period) to the inputs above produces each figure below.
  • At this operating point the engine returns 58,500 $ / period for lubrication cost, the number this scenario is built around.
  • At this operating point the engine returns 9,000 L for lubricant used.
  • At this operating point the engine returns 4,500 hr for lubrication runtime.
  • At this operating point the engine returns 6.5 $ / unit for lubricant unit cost.

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 150% above the baseline at 58,500 $ / period.
  • A figure at this level is achievable when lubricant application rate is genuinely sustained, not just peaked for a shift. It assumes a constant application rate over the whole period, so it won't capture seasonal viscosity changes, top-off losses, or stop-start cycles that alter real consumption.

Results at a glance

  • Lubrication Cost: 58,500 $ / period (headline result)
  • Lubricant Used: 9,000 L
  • Lubrication Runtime: 4,500 hr
  • Lubricant Unit Cost: 6.5 $ / unit

Run it with your numbers

  • Every input above is editable in the live Lubrication Consumption calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.