Is it acceptable to change engine oil without replacing the filter?
2 Answers
It is not advisable to change engine oil without replacing the oil filter, as the contaminants in the old filter can re-enter the oil circuit and affect the normal operation of the engine. Below are the steps for changing engine oil: 1. Use a jack to lift the vehicle, locate the drain plug and unscrew it to drain the oil; 2. After removing the oil filter, place a container underneath; 3. Install a new oil filter and add new engine oil. The functions of engine oil are as follows: 1. Reduce friction and high temperatures; 2. Cool and lower temperature; 3. Clean and remove contaminants; 4. Absorb shocks and cushion impacts; 5. Prevent rust and corrosion. Additional information: Engine oil, also known as motor lubricant, is composed of base oil and additives. The base oil is the main component of the lubricant, determining its fundamental properties, while the additives compensate for and improve any deficiencies in the base oil's performance.
I don't think changing the engine oil without replacing the filter is a good idea. The filter acts like a sieve for the oil, and over time it gets clogged with metal shavings and sludge. If you don't replace it, the fresh oil you just poured in will immediately get contaminated and turn into waste oil. I've seen many car owners try to save a few dozen bucks by skipping the filter, only to end up with engine knocking noises within months. When taken apart, the bearing shells were already scratched. The repair costs would far exceed a few hundred bucks. The filter and oil are like a golden pair—it's generally recommended to replace them together every 5,000 to 10,000 kilometers. Since you're already draining the oil pan, replacing the filter is no extra hassle. Don't let small savings ruin your engine's heart.
