Lubrication Automobiles 39 Lubrication and lubricants 30 Lubricating oils 27 Analysis 16 Air conditioning 9 Refrigeration and refrigerating machinery 8 Internal combustion engine 6 Lubrication systems 6 Maintenance and repair 6 Design and construction 5 Testing 5 Tribology 5 Motors 4 Roller bearings 3 Bearings 2 Four-stroke cycle engines 2 Fuel consumption 2 Gearing 2 High temperature chemistry 2 Internal combustion engines 2 Internal conbustion engines 2 Mechanical engineering 2 Motor vehicles 2 Spark ignition engines 2 Transmission devices 2 Wireless communication systems 2 Additives 1 Control 1 Engines 1