What are the precautions for changing engine oil and oil filter?

[Maxine]

Precautions for changing engine oil and oil filter are: The engine oil and oil filter should be replaced simultaneously, which is beneficial for extending the engine's service life. When removing the oil filter, use a filter wrench or appropriate tools to prevent damaging the threads at the connection point. After prolonged use, the filtering efficiency of the oil filter will decrease, and the oil pressure passing through the filter will drop. When the oil pressure drops to a certain level, the filter's bypass valve will open, allowing oil to enter the oil circuit through the bypass to prevent insufficient oil pressure. However, the oil entering the oil circuit at this time is unfiltered and may carry impurities into the oil circuit, increasing component wear. In severe cases, impurities in the oil may even clog the oil passages, causing mechanical failures. The quality of the oil filter directly affects the lubrication performance of the engine oil on the engine.

[MacBrayden]

Changing engine oil and oil filter is something I often do myself, which is quite fun but requires some skills. Choosing the right oil is the first step—check the recommended type and viscosity in the owner's manual, don't just buy randomly. Warm up the engine a bit; the oil flows faster when it's warm, but don't let it get too hot to avoid burning your hands. Park on level ground, engage the handbrake, and use a jack to lift the car safely. Wear gloves when removing the drain plug, and let the old oil flow into a pan without spilling on the ground. The oil filter should also be replaced—lightly lubricate the new filter's rubber gasket with fresh oil before tightening it, but don't over-tighten to avoid leaks. Pour in the new oil slowly using a funnel, don't overfill, and check the dipstick to ensure it's at the midpoint. Finally, dispose of the old oil at a recycling center—it's both eco-friendly and legal. Changing it every 5,000 miles or so keeps the engine running smoother, saves on major repair costs, and extends the car's lifespan. It takes me about half an hour each time, which is totally worth it.

[Miller]

I've changed it with my kids, safety is the top priority: find a safe spot, wait for the car to cool down to avoid burns. Make sure the jack is stable and don't forget the handbrake. Choose engine oil that matches the manual's specifications, avoid cheap products. Place a cloth under when draining old oil to prevent leaks; lubricate the filter gasket before tightening to avoid oil leaks. Pour new oil carefully to avoid overfilling. Finally, take the used oil to an auto repair shop for recycling. If you're not confident, it's more worry-free to let a professional shop handle it. Regular oil changes keep the engine lubricated, reduce wear, extend vehicle life, and ensure smooth, worry-free driving. Remember to check every six months or five thousand miles to prevent major issues.

[LeDominic]

Changing oil and filter yourself saves time and money: Warm up the engine just until it's lukewarm. Park on level ground and engage the handbrake. Drain the old oil into a pan and dispose of it properly. Unscrew the old filter, replace with a new one, and remember to lubricate the new filter's gasket with fresh oil. Pour in new oil according to the manual's specified amount. Check for leaks, then take a short drive to test. Dispose of the used oil responsibly. The whole process takes about half an hour and costs just a few dozen yuan. Remember to choose the correct oil viscosity and change it regularly to reduce engine problems.