Can engine oil be changed once a year?
2 Answers
For conventional engine oil, it is recommended to change it every 5,000 kilometers or every six months. Changing engine oil once a year depends on how many kilometers are driven in a year and the grade of oil used. First, ensure that the mileage does not exceed 5,000 kilometers. Second, consider the quality and grade of the oil used. High-quality, high-grade engine oil can extend the oil change interval. More information about engine oil is as follows: 1. Engine oil, also known as motor lubricant, serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption for the engine. 2. Engine oil consists of base oil and additives. Base oil is the main component of lubricating oil, determining its basic properties. Additives compensate for and improve the shortcomings of base oil, imparting new properties and making them an important part of lubricating oil. 3. The grade after oil classification indicates its viscosity specification. The smaller the number before "W," the better the low-temperature fluidity of the oil, meaning it can be used in lower environmental temperatures and provides better engine protection during cold starts. Taking 10W-40 motor oil as an example: W stands for winter, the number 10 before W represents the freezing point temperature, with 10W oil corresponding to a freezing point temperature of -25°C. The number after W represents the kinematic viscosity of the oil at 100°C, with higher values indicating higher viscosity.
I'm used to changing the engine oil every 10,000 kilometers or once a year, which is a common maintenance interval for many car owners. I remember my neighbor tried to save money last year by not changing it for two years, and the engine noise became as loud as a tractor. When the repair shop opened it up, it was full of sludge. Synthetic oil technology is indeed good these days, but don't completely believe those 'long-lasting' claims. If you drive very little or frequently take short trips, it's better to change it every 8 months to avoid emulsification issues. Always check the manual—German cars generally have stricter requirements.
