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Why does the engine sound louder after an oil change?

1 Answers
StIris
07/28/25 9:46pm
The reasons why the engine sounds louder after an oil change are: 1. Too much oil is added; 2. The viscosity of the added oil is inappropriate. The precautions for changing the oil are: 1. Perform it when the engine is hot to ensure the old oil is completely drained; 2. Add oil and ensure the amount is appropriate; 3. After adding oil, start the engine and check for any leaks. Run the engine for 3 minutes to confirm the oil level is at the normal mark. The method for changing the oil is: 1. Start the engine to warm it up so the transmission reaches operating temperature; 2. Remove the drain bolt to collect the old oil from the transmission; 3. Once the old oil is drained, open the oil pan to replace the transmission filter; 4. Reinstall the oil pan and tighten the drain plug; 5. Add transmission oil; 6. Start the car and shift through all gears; 7. Check the automatic transmission fluid level and adjust if necessary.
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