What is the normal value for car engine oil?

[LeNadia]

Car engine oil normal values vary depending on the engine type: 1. For gasoline engines, the normal range is between 190 to 490 kpa; 2. For diesel engines, the normal range is between 290 to 590 kpa. The functions of car engine oil include: 1. Lubrication: Reducing friction and wear between moving parts; 2. Cooling: Absorbing heat generated in the combustion chamber and piston top to cool the engine; 3. Sealing: Filling the gaps between piston rings and cylinder liners to prevent combustion pressure leakage; 4. Cleaning: Preventing contaminants and oxide impurities from adhering to internal engine components, maintaining cleanliness; 5. Rust prevention: Neutralizing acidic substances produced by combustion gases to prevent engine rust and corrosion.