How often should I change the oil if I don't drive my car much?
2 Answers
Engine oil has a replacement cycle, and as a car owner, you should strictly adhere to the oil change intervals. Generally, mineral oil should be changed every 5,000 kilometers or every six months, semi-synthetic oil every 7,500 kilometers or every eight months, and full-synthetic oil every 10,000 kilometers or once a year. These are ideal replacement intervals, and the actual replacement cycle depends on the driving environment, mileage, and time. Engine oil, also known as motor lubricant, plays multiple roles in the engine, including lubrication and wear reduction, auxiliary cooling, sealing to prevent leaks, rust and corrosion prevention, and shock absorption.
Having driven for so many years, my experience with infrequent car usage tells me that oil changes shouldn't be determined solely by mileage. Even if the car sits idle, engine oil deteriorates due to oxidation and moisture intrusion, reducing its protective effect on the engine. I generally recommend checking the oil every 6 to 12 months, replacing it immediately if it appears darkened or shows signs of water contamination. It's best to follow the vehicle manual's guidelines—some brands specify intervals not exceeding one year. Neglecting this can accelerate engine wear, leading to costly repairs. For my own long-idle car, I consistently change the oil in autumn, ensuring everything is optimal before winter to prevent startup issues. Maintaining this habit significantly extends engine life while saving hassle and effort.
