Functions of engine oil (Opel Kadett D)

Despite all the efforts to improve the OPEL KADETT D with technical measures and increase its service life, operating safety and economy, the main aspect remains the lubrication and maintenance of the car.

Depending on the operating conditions, different requirements are imposed on engine oils. Therefore, it is very difficult to accurately determine the effect of different operating conditions on the lubricant. Engines that operate at high speeds or at full load for a long time reach high oil temperatures.

When exposed to high temperatures and oxygen, the oil begins to oxidize. The oxidation products thicken the oil and can accumulate on the top of the piston, in the piston ring grooves, and on the valve stems. This can lead to carbon deposits on the valve head. If the cylinders receive a mixture that contains little fuel, the engine will rarely operate at full power. If you drive with a cold engine (city traffic), then the consequence is incomplete combustion Soot, oil carbon and unburned fuel itself lead to the formation of dirt, acid and asphalt. Unburned fuel settles on the cold walls of the cylinder and flows into the engine crankcase, while the oil film is washed off the cylinder and piston. The consequences are reduced lubrication and dilution of the oil, which has a negative effect. If the oil dilution is very high, the oil should be changed prematurely. On long trips (hot engine) some of the gasoline evaporates from the oil, especially in winter (lots of cold alcohol high gasoline content in oil) the oil condition should be checked more frequently.