Oil dilution in a gasoline engine

If the cylinders are over-rich and the engine rarely runs at full power or does not run at full power at all and does not have time to reach operating temperature while driving (urban traffic cycle), resulting in incomplete combustion of the fuel.

Soot, oil soot and other products, unburned fuel, moisture condensate lead to the formation of turbidity, an acidic environment. Unburned fuel also settles on the walls of cold cylinders, flows into the crankcase, and the oil film is washed off the walls of the cylinders and pistons. As a result, insufficient lubrication of the cylinder walls and dilution of the oil, which loses its properties, which depend on the amount of fuel dissolved in it.

If the oil is too thin, it will need to be changed prematurely.

With heavy traffic (hot engine) gasoline contained in oil evaporates, therefore, especially in winter (repeated starts of a cold engine and, as a result, a high content of gasoline in the oil), frequent oil level checks are required.