Should sedan engine oil be changed based on time or mileage?

1 Answers
MacJeffrey
07/29/25 9:06pm
Sedan engine oil should be changed based on either time or mileage, whichever comes first. The method for changing engine oil is as follows: 1. Start the vehicle engine to warm it up; 2. Unscrew the oil drain bolt; 3. Remove the oil filter; 4. Apply new oil to the gasket of the new oil filter; 5. Pour the new oil into the oil pan; 6. Check for leaks under the engine and inspect the oil dipstick before starting the engine for testing. The reasons for insufficient engine oil pressure are: 1. Dirty and viscous oil prevents the oil pump from drawing and pumping oil; 2. Insufficient engine oil storage; 3. Oil becomes too thin or leaks from the engine's friction gaps.
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