How to Identify the Quality of Engine Oil?

[LeDominic]

Methods to determine the quality of car engine oil are as follows: 1. Check the packaging: Generally, the quality of engine oil can be identified from its outer packaging. Brand-name engine oils have one-time-use caps with sealing foil at the opening, usually bearing the manufacturer's special mark. If these features are missing, it might be counterfeit oil. 2. Smell the oil: Engine oil is typically a blend of base oil and additives, with synthetic oils containing various additives. Full synthetic oil should have a fragrant smell from the additives. If the oil on the market has a noticeable sour odor, it indicates the oil has deteriorated. 3. Shake it: High-quality engine oil has good fluidity, so vigorous shaking will produce some bubbles. If the bubbles disappear very slowly, it could be inferior quality oil.