What are the types of engine oil for cars?

[AndresFitz]

The engine oils for cars include: 1. Conventional mineral oil; 2. Semi-synthetic oil; 3. Fully synthetic oil. The functions of engine oil are: 1. Reducing friction and high temperatures; 2. Cooling and lowering temperature; 3. Cleaning and removing contaminants; 4. Damping and cushioning; 5. Preventing rust and corrosion. The method for changing engine oil is: 1. Lift the vehicle with a jack, locate the drain plug, and loosen it to drain the oil; 2. Remove the oil filter and place a container underneath; 3. Replace with a new oil filter and add new engine oil. Precautions for using engine oil include: 1. The oil level should be slightly below the mark on the dipstick. Engine oil is crucial for the engine, serving the dual functions of lubrication and heat dissipation; 2. Choose engine oil with different viscosities based on the engine's operating conditions. Use lower viscosity oil in colder seasons and higher viscosity oil in warmer seasons.