What is the shelf life of synthetic engine oil?

1 Answers
ArcherLynn
07/30/25 7:12am
Synthetic engine oil has a shelf life of up to 5 years, but opened oil deteriorates faster and should be used within one year. Synthetic oil is artificially produced through chemical methods. Depending on its intended use, various components of synthetic oil can be modified. During production, natural substances are chemically decomposed and then synthesized with other materials to create synthetic engine oil. The method for changing fully synthetic engine oil in a vehicle is: 1. Start the vehicle engine for preheating; 2. Unscrew the drain bolt; 3. Remove the oil filter; 4. Apply new oil to the gasket of the new filter; 5. Pour new oil into the oil pan; 6. Check for leaks under the engine and inspect the oil dipstick before starting the engine for testing.
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