What Are the Reasons for Engine Vibration After an Oil Change?
2 Answers
The reasons for engine vibration after an oil change are: 1. Too much or too little oil added; 2. The oil is unsuitable for the vehicle, of poor quality, or contains excessive impurities; 3. Clogged fuel injectors. The functions of engine oil include: lubrication and anti-wear, auxiliary cooling, cleaning, sealing to prevent leaks, rust and corrosion prevention, and shock absorption. The steps for changing engine oil are: 1. Lift the vehicle, remove the protective plate, and place a container of about 10 liters under the oil drain plug; 2. Unscrew the oil drain plug, use an air gun to blow for two minutes at the oil filler port, tighten the drain plug after draining, and wipe with a tissue to check for leaks; 3. Reinstall the protective plate, lower the vehicle, and use a funnel to add oil through the filler port.
After changing the engine oil a few times, I noticed the engine shaking, which made me really curious about the cause. The most likely reason is improper oil level—adding too much oil can create excessive foam inside, leading to uneven lubrication and causing the oil pump to work inefficiently, resulting in shaking. On the other hand, too little oil means insufficient lubrication, increasing friction between parts. Another possibility is using the wrong type of new oil, such as low-viscosity summer oil in winter, which fails to properly coat components. There could also be issues with the oil filter installation—if it's not tightened properly or the seal is damaged, air can enter, creating air pockets that affect oil pressure. Sometimes, old oil isn't fully drained and mixes with the new oil, causing chemical reactions that lead to problems. Another factor could be disturbing the engine mounts or sensors during the oil change, exposing pre-existing looseness. It's important to quickly check the oil level to see if it's within the standard range. If not, take it to a shop to test the oil pressure to prevent engine wear and premature failure.
