How Often Should Idemitsu Full Synthetic Engine Oil Be Changed?
2 Answers
For those using imported semi-synthetic engine oils from major brands or domestic and Japanese/Korean full synthetic engine oils, the maximum recommended interval is 7,500 kilometers or 8 months. Additional information is as follows: 1. Full Synthetic Engine Oil: Full synthetic oils offer superior high and low-temperature performance, extended oil change intervals, and are suitable for more demanding driving conditions. They are ideal for luxury and high-performance vehicles, with a recommended change interval of approximately 10,000-12,000 kilometers. 2. Semi-Synthetic Engine Oil: The recommended change interval for semi-synthetic oils is around 8,000-10,000 kilometers, offering a balance between price and performance. 3. Mineral Engine Oil: This type of oil typically requires replacement every 5,000 kilometers.
I've been using Idemitsu full synthetic oil for many years and found that the replacement cycle shouldn't be rigidly fixed. In most cases, I change it every 10,000 to 15,000 kilometers or once a year, which aligns with the vehicle manual's recommendation. However, driving habits significantly affect this: if I frequently drive in congested urban areas where the engine starts and stops often, it accelerates oil degradation, so I shorten the interval to around 8,000 kilometers. During hot weather or after long highway trips, the oil tends to thin out, and I check the dipstick—if the color darkens, it's time for a change. Ignoring this can lead to engine carbon buildup, increased wear, and higher repair costs. Developing a habit of checking every six months is safe and reliable.
