GEAR OIL ADDITIVES ADDITIVES AND ADDITIVES FOR ENGINE OILS Over the past decade, a large number of different ADDITIVES TO ENGINE OILS have appeared on car markets, service stations and workshops. In advertising documents, such drugs are presented as a panacea for all engine problems. We hope that the information below will help you in many cases to make the right decision. Why do you need an additive oil? Until 1933, lubricants for internal combustion engines in the world used oil without additives. In connection with the creation in the United States of the Caterpillar company of diesel engines with a high degree of boost, the problem arose of increasing the detergent properties of oils. Almost simultaneously with the problem of increasing the detergent properties of oil, the problem arose of increasing their oxidative stability at elevated operating temperature. The main disadvantage of oils without additives is their low thermal stability and high tendency to form deposits on engine parts. Therefore, the main direction of increasing the efficiency. engines is considered an increase in the temperature regime of their operation, and in the future – the creation of an adiabatic engine, which will work without a cooling system. The most important characteristic of motor oils is their viscosity. The viscosity of the oil depends on its sealing properties, the consumption of oil for carbon monoxide and external leaks, the pumpability of the oil, the wear of engine parts, and the fuel consumption. To operate the engine at high operating temperatures and reliably start it at low temperatures, since 1951 all-weather oils have been produced. Reducing the viscosity dependence of these oils on temperature is achieved by introducing special additives into their composition – viscosity index improvers.