Technical Explanation
A new system can contain Construction/Fabrication Debris, Welding Residue, Rust, Preservation Oil, Dust, and Assembly Contamination in Piping, Tanks, Coolers, or Components. Filling with New Oil without removing these materials can unintentionally turn the new oil into a Cleaning Fluid.
Commissioning Cleanliness must therefore begin by defining a Flushing Strategy and Acceptance Criteria linked to system Criticality. Flow, Turbulence, Temperature, and Temporary Filtration must be designed to carry contaminants out of the required areas, not merely circulate oil.
New Oil should be filtered during Transfer/Fill and a Baseline should be checked before or after entering the system according to the plan, so that the actual starting condition of the Lubricant is known. This is important for interpreting future Oil Analysis.
When changing from Preservation/Flushing Oil to Operating Oil, Compatibility and Residual Volume must be considered in the same way as an Oil Conversion in an operating system.

Impact on Equipment
- Filter Plugging and High DP during Commissioning.
- Particle-related Wear in Bearing/Servo Components during Early Life.
- New Oil becomes Contaminated before Start-up.
- An abnormally high Baseline is created, making future Trends difficult to interpret.
- Rework and Delays occur before Commercial Operation.
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Recommended Approach
Develop a Commissioning Lubrication Plan before oil arrives on site: Oil Acceptance, Storage, Transfer, Flushing, Temporary Filtration, Sampling Point, and Final Acceptance.
Define what “Ready to Start” means using numbers and evidence such as Target Cleanliness, Water, Visual Inspection, Filter Condition, and a Stable Trend—not merely completion of the specified circulation time.
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What Can SUTAIYO & Lubefix Do?SUTAIYO can support everything from selecting Mobil Lubricants according to OEM Requirements, to establishing New Oil Acceptance and defining a Lubrication/Commissioning Strategy linked to the Plant's Reliability Target.Lubefix can perform Flushing, Temporary Filtration, Filtered Filling, Sampling, and Final Conditioning on site, giving the customer one team that connects Product, Technical Requirements, and Execution.
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Expected Customer Outcomes• Start the machine with an appropriate cleanliness level from Day 1.• Reduce Early-life Failure, Rework, and Commissioning Delays.• Establish a strong Baseline for Condition Monitoring throughout the machine's service life.
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SUTAIYO | Mobil Lubricants | Lubefix Technical Services
