What are the consequences of not changing engine oil?

1 Answers
LeonardoDella
07/29/25 9:32pm
The hazards of not changing engine oil include: 1. Reduced sealing effect; 2. Decreased lubrication effect; 3. Diminished cooling effect; 4. Increased wear on mechanical parts; 5. Corrosion of internal components; 6. Further damage to the engine; 7. Higher maintenance costs. Most engine oils have a shelf life of five years, and they are classified into various grades, including mineral oil, synthetic oil, and full synthetic oil. The shelf life of engine oil varies, typically ranging from 3 to 5 years, provided it remains unopened. Once opened, engine oil is prone to oxidation upon contact with air, which shortens its shelf life. After oxidation, the oil becomes turbid and unclear.
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