When to Change Winter Engine Oil for Cars?

[AxelLynn]

Winter engine oil for cars should be changed before the winter solstice. Engine oils are categorized into full synthetic, semi-synthetic, and mineral oils. The functions of engine oil include: 1. Lubrication: Reducing friction and wear between moving parts; 2. Cooling: Absorbing heat generated in the engine combustion chamber and piston tops to cool the engine; 3. Sealing: Filling the gaps between piston rings and cylinder liners to prevent combustion pressure leakage; 4. Cleaning: Preventing pollutants and oxide impurities from sticking to the engine interior during combustion, maintaining cleanliness; 5. Rust prevention: Neutralizing acidic substances produced by combustion gases to prevent engine rust and corrosion.