Not all oils and lubricants are the same

There are many kinds and type of lubricants. Each serves its primarily functions and has own characteristics:

• Engine oil (car, aviation etc) for lubricating the whole engine and serve lesser in the uppper combustion chamber. Oiling the piston rings, cylinders, valve gear, bearings; cool piston; prevent deposition on metal surfaces
• Gear oil for preventing metal contact and wear of spur gears, hypoid gears, worm gears; cool gear cases
• Torque converter fluid for lubrication, transmit power
• Hydraulic brake fluid for transmitting power
• Refrigerator oils for lubricating compressor pump
• Steam-turbine oil for lubricating reduction gearing, cool
• Steam cylinder oil for lubrication in presence of steam at high temperatures