What is the process for changing car engine oil?

[Gilbert]

The process for changing car engine oil is: 1. Place an old oil container under the oil pan at the bottom of the vehicle's engine compartment, use a specialized wrench to unscrew the oil filter and remove it; 2. Slowly loosen the oil pan drain plug to drain the old oil, after a period of draining, reinstall the drain plug; 3. After completely draining, tighten the screw (not too tight), then pour new oil into the engine and screw on the oil filter. After adding oil, remember to check the oil dipstick. Engine oil serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption for the engine, earning it the reputation as the 'blood' of the car.

[SadieLynn]

Here's how I change the engine oil: First, let the engine warm up for about 3-5 minutes before turning it off. While it's still warm, crawl under the car to locate the oil pan drain plug. Remember to place a large bucket underneath to catch the oil before loosening it. Once most of the dark old oil has drained out, unscrew the oil filter. Before installing the new filter, apply a bit of fresh oil on the rubber gasket, then hand-tighten it – no need to overtighten with tools. Finally, pour fresh oil through the engine hood filler until it reaches slightly above the midpoint on the dipstick. Don't forget to start the engine and let it run for two minutes to check for leaks, then turn it off and wait a few minutes before checking the dipstick again and topping up if necessary. Never dispose of used oil improperly; take it to a repair shop for recycling – that's the most reliable method.

[OEmma]

I often change the engine oil myself. Key preparations: Besides new oil and an oil filter, you need the right socket wrench for the drain plug and a waste oil pan with at least an 8-liter capacity. Wear protective gloves during the operation, ensure the vehicle is parked on level ground with the handbrake engaged, and it's best to place wheel chocks in front to prevent rolling. Note that some drain plug washers are one-time use—replacing them is safer. Don't mistake the filler cap; the bright yellow one is the oil cap. When adding new oil, pour in three-quarters of the bottle first, start the engine to circulate it, then check the level and top up slowly—overfilling can harm the engine. After finishing, remember to reset the maintenance reminder light on the onboard computer.

[DiMadison]

Pay special attention to safety when changing oil: Ensure the ground is firm and level before jacking up the car, and locate the manufacturer's marked lifting points. The drain plug is prone to stripping, so use a hex socket and apply force vertically. When removing the old filter, oil often leaks everywhere, so lay down oil-absorbent pads nearby to save on cleanup. Before installing the new oil filter, remember to apply a thin layer of oil to lubricate the rubber seal, and tighten it just 3/4 turn after it makes contact. I always prepare an extra half-liter of oil, as older cars tend to consume some. After finishing, be sure to check under the chassis for any oil drips—last time, my filter wasn't tightened properly and leaked all over the place.

[VonLydia]

Comparing the services of 4S shops and quick repair shops, doing your own oil change can really save a lot. The tool investment can be covered with around 200 yuan, with commonly used drain bolt sockets being just two sizes: 17mm and 19mm. The key is to buy genuine consumables: look for the API certification icon for engine oil, and choose air filters from major manufacturers like Mann or Mahle. Last time I bought fake engine oil online, it turned black and emulsified after just 3,000 kilometers. Now I always check authorized stores on the official websites of branded engine oils to make purchases. Crunching the numbers, bringing your own materials to a repair shop costs just 50 yuan in labor fees, which is more than half cheaper than going to a 4S shop.

[Millie]

I've got some seasonal oil change tips: In winter, switch to 0W-grade oil with good low-temperature fluidity for smoother cold starts. Before draining, use a heater to warm the oil pan – you'll get an extra half-cup of old oil out. During hot summers, remember to use higher viscosity oil like 5W-40, especially important for older cars. Northerners should change oil before winter arrives – at -20°C, frozen waste oil simply won't drain completely. Coastal areas need to watch humidity – use up newly opened oil containers immediately as dampness deactivates oil additives. Recently discovered synthetic oil lasts 5,000 km longer than mineral oil, proving more economical long-term.