When Should Winter Engine Oil Be Changed?
2 Answers
There is no significant relationship between changing engine oil and winter or summer. The conditions for changing engine oil and the classification and functions of engine oil are as follows: Conditions: Reaching a certain mileage or usage duration. Classification: Engine oil is categorized into fully synthetic, which requires maintenance every 10,000-15,000 kilometers or once a year; semi-synthetic, which needs maintenance every 8,000-10,000 kilometers or once a year; and mineral oil, which requires maintenance every 5,000-7,500 kilometers or every six months. Functions: To reduce friction and high temperatures, a sufficiently thick oil film separates the surfaces of relatively sliding parts, thereby minimizing wear. Sealing: reduces gas leakage and prevents external pollutants from entering. Anti-rust: lubricating oil adheres to the surface of parts, preventing contact with water, air, acidic substances, and harmful gases. Buffering and cleaning: the flow of lubricating oil washes away dirt generated on the working surfaces of parts.
I drove a taxi in the north for ten years, so I know this matter well. Winter engine oil must be changed before winter sets in, preferably before the temperature drops below zero. Older models using mineral oil start feeling sluggish after just 5,000 kilometers, with the engine shaking for seven or eight seconds on cold starts. Nowadays, new cars use full synthetic oils like 0W-20 or 5W-30, which can last 10,000 kilometers between changes. Remember to check the dipstick—if the oil looks black and feels gritty, it's time for a change. Last year, my neighbor waited until New Year's Day to change his oil, and during those -20°C days, his engine froze solid and wouldn't start, costing him 500 yuan for a tow truck. I always change mine in November without fail, and I also test the antifreeze's freezing point to avoid breaking down and freezing on the road.
