ATIEL & UEIL Joint Sustainability Committee
• Tracking oil temperature, viscosity, and the presence of wear particles allows for better management of gear oils, reducing waste and preventing damage to machinery.
• Consider using re-refined gear oils in non-critical applications after proper re-refining processes, reducing environmental impact and cost.
10.3.6 Metal Working Oils (Neat and Soluble)
• Regular Monitoring and Replenishment for both neat and soluble oils. Specifically for soluble oils it’s essential to monitor the concentration and replenish as needed to avoid contamination and loss of effectiveness. Regularly check the pH and microbial content to prevent rancidity.
• Filtration is crucial to extend oil life, especially in applications where metal shavings and other debris are prevalent. Filtration systems can capture these contaminants, ensuring the oil stays effective longer.
10.3.7 Stationary (Gas) Engine Oils
• Regular oil analysis like condition-based maintenance (e.g., checking for soot, viscosity, Total Acid Number, Total Base Number and wear metals) can extend the life of engine oils by determining optimal change intervals, avoiding over- or under-changing.
• Implement filtration systems that target particulates and soot in engine oils. By reducing contamination levels, the need for frequent oil changes is minimized, and the lifespan of the oil is extended.
10.3.8 Refrigeration Compressor Oils
• Refrigeration Compressor oils are highly sensitive to contamination from refrigerants, moisture, and particulates. Regular monitoring of the oil’s acidity and moisture content can help detect issues early and avoid costly replacements.
• Using filtration systems that capture moisture and particulates from compressor oils will significantly prolong their life. Also, separating oil from refrigerants and water during operation helps maintain oil quality.
• Proper Oil Change Practices: Since compressor oils can degrade over time due to moisture, heat, and wear, setting up an oil change schedule based on manufacturer recommendations and oil analysis is key to reducing unnecessary disposal and extending oil life.
10.3.9 Transformer Oils
• Transformer oils are highly sensitive to contamination from moisture, acids, and particulates. Regular monitoring (e.g. acidity testing, moisture content analysis) helps detect potential issues early, reducing the risk of failures. Online monitoring systems further enable proactive maintenance.
• Filtration systems that remove moisture and particulates play a crucial role in extending the lifespan of transformer oil while preserving its insulation properties.
• Transformer oils of hydrocarbon type can and should be recycled through rerefining EoL. Segregation from other types of used lubricants and waste fluids is however required to allow circulation back to use as transformer oil.
Version 11.06.2025 © ATIEL and UEIL Lubricants & Greases End of Life, Sustainable Best Practices
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