Oil analysis is a low-cost way to see inside an air compressor without dismantling it. A small oil sample reveals wear metals, contamination and oil condition, letting you catch problems before they become failures.
What the report measures
- Wear metals such as iron, copper and aluminium from components
- Silicon from dust ingress, and water from condensation
- Viscosity and oxidation to judge oil service life
- Acid number as an indicator of oil degradation
Reading the trends
A single sample is useful, but trending matters more. A rising iron count indicates bearing or rotor wear, copper points to coolers or bearings, and silicon means the intake filtration is failing. Water contamination points to cooler leaks or poor condensate drainage.
Acting on results
Take samples at consistent intervals, ideally every 1000–2000 hours for critical machines. When a trend rises, investigate before a failure occurs, and use the analysis to extend or shorten oil change intervals safely.