Can Semi-Synthetic Engine Oil Be Changed Once a Year?
3 Answers
Semi-synthetic engine oil should not be changed only once a year; it is recommended to replace it every 7 to 8 months. Otherwise, it may deteriorate easily, leading to increased carbon deposits and, in severe cases, oil burning issues. The replacement cycle for semi-synthetic oil is approximately 7,500 kilometers, so it's advisable to change it on time. Different brands of engine oil have varying formulations, resulting in differences in viscosity, anti-wear properties, corrosion resistance, anti-knock performance, and volatility. Mixing different brands may cause incompatibility or reactions, so oils of different brands should not be mixed. Semi-synthetic oil is one type of automotive engine oil, made using semi-synthetic base oil.
I've been driving for many years and have used semi-synthetic oil. Changing it once a year might be fine, but it depends on how you drive. If you drive less than 5,000 kilometers a year, like me who only drives on weekends, the oil doesn't degrade much, so changing it once a year saves time and money. However, if you frequently drive long distances or in congested city traffic, the oil will degrade faster, and it's best to change it every six months or based on mileage. I learned from experience: once I delayed changing the oil for 13 months, the oil thickened, and the engine started making knocking sounds. Fortunately, I took it to the shop in time and avoided more serious damage. I recommend regularly checking the oil's color and level. If it's dark brown or noticeably low, change it sooner rather than just relying on time. Remember, engine oil lubricates the components, and delaying too long will accelerate wear and tear. Safety first.
Safety should never be taken lightly. I always advise family and friends not to rely solely on time-based oil changes. While semi-synthetic oils are designed to potentially last a year, actual driving habits greatly affect performance. If you frequently drive on highways or operate in high-temperature environments, the oil breaks down faster and loses effectiveness. I had a neighbor whose engine overheated and broke down due to old oil, resulting in hefty repair bills. Therefore, I believe the safest approach is to change oil every six months, or at least follow the mileage recommendations in your vehicle's manual. Checking the dipstick is simple – if the oil appears dark or the level is low, it indicates a problem. Prevention is better than repair; a small expense can buy peace of mind.
