Definition
Oil analysis is the laboratory or field testing of a lubricant sample to reveal three types of information: contamination (particles, moisture), wear-particle content and composition (indicating which component is wearing and how), and the remaining quality of the lubricant itself (additive depletion, viscosity change), informing both machine condition and lubricant-change decisions.
Key facts
- Reveals three distinct categories of information: contamination, wear-particle content, and lubricant condition itself.
- Wear-particle composition can indicate which specific component (bearing, gear) is generating the wear, based on material type.
- Directly informs both lubrication-management decisions (when to change the oil) and broader condition assessment (is a component wearing abnormally).
- Requires representative, consistent sampling technique to produce comparable, trustworthy trend data over time.
How does Oil analysis work in maintenance?
Oil analysis reveals contamination present in the lubricant (particles, moisture, other fluids), wear-particle count and material composition (pointing toward which component is generating wear), and the remaining condition of the lubricant itself (additive depletion, viscosity drift): three related but distinct pieces of information from one sample.
What does Oil analysis require?
Results are used both to make lubrication-management decisions (is the oil itself still fit for service, or does it need changing) and as a condition-monitoring input, since rising wear-particle counts of a specific material can indicate a developing mechanical fault in a specific component well before other symptoms appear.
FAQ
Frequently asked questions
What statements about oil and asset does an oil analysis provide?
It provides statements about lubricant contamination, wear-particle content pointing to which component is wearing, and the remaining quality of the lubricant itself, informing both condition assessment and lubrication-management decisions.
Last reviewed: