What does PAO engine oil mean?

1 Answers
VonLondon
07/29/25 3:31pm
PAO engine oil refers to olefin-based engine oil, which is a type of synthetic base oil. The functions of engine oil include: 1. Acting as a lubricant: reducing friction and wear between moving parts; 2. Acting as a coolant: absorbing heat generated in the engine combustion chamber and piston crown to cool the engine; 3. Acting as a sealant: filling the gap between piston rings and cylinder liners to prevent combustion pressure leakage; 4. Acting as a cleaner: preventing combustion pollutants and oxide impurities from adhering to the engine interior, maintaining cleanliness; 5. Acting as a rust inhibitor: neutralizing acidic substances produced by combustion gases to prevent engine rust and corrosion.
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