What Are the Reasons for the Car Engine Oil Light to Illuminate?

[SanBrody]

Reasons for the car engine oil light to illuminate: 1. Excessive oil viscosity: The viscosity of the engine oil is closely related to its quality. Higher viscosity means better resistance to high temperatures, and vice versa. However, higher viscosity is not always better, so it's essential to use an oil grade that matches your engine. 2. Blocked or improperly adjusted pressure relief valve: To prevent excessively high oil pressure in the lubrication system, which increases engine power consumption and causes leaks at sealed connections in the oil circuit, a pressure relief valve is installed in the main oil passage or oil pump. Its function is to limit the oil pressure in the lubrication system, ensuring it does not exceed the specified value. A faulty pressure relief valve can lead to abnormal oil pressure, causing the oil light to illuminate. 3. Insufficient oil level: If the oil level is too low, the oil pump's pumping capacity decreases or fails to pump oil due to air intake, resulting in reduced oil pressure. This can lead to increased wear on the crankshaft and bearings, as well as the cylinder liners and pistons, due to inadequate lubrication.