| 11. | Both gears are enclosed in a liquid-tight housing containing lubricating oil.
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| 12. | During this heating, the lubricating oils are burned off, leaving a dry surface.
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| 13. | They refined the viscous substance onsite, making it into lubricating oil and kerosene.
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| 14. | Unburnt fuel then leaks past the piston rings and contaminates the lubricating oil.
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| 15. | Before the ship sailed, the crew discovered that the barrels of lubricating oil leaked.
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| 16. | The latest standard also banned the adding of used lubricating oil ( ULO ).
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| 17. | The oil-recovery business collects and recycles used lubricating oils from auto dealers and others.
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| 18. | There are small quantities of lubricating oil, probably hydraulic oil.
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| 19. | The company also manufactured test equipment for various purposes, including properties of lubricating oil.
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| 20. | Also a limited use of talc as friction-reducing additive in lubricating oils is made.
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