Does Idemitsu 0W20 degrade significantly?
2 Answers
Idemitsu 0W20 engine oil can maintain its performance for up to one year or 10,000 kilometers before requiring replacement, with minimal degradation. Below are specific methods to determine if the oil has degraded: 1. Rubbing Test: Take a small amount of oil from the oil pan and rub it between your fingers. If it feels sticky and forms strings, the oil is still good; otherwise, it needs replacement. 2. Dipstick Test: Pull out the oil dipstick and check if the scale marks are clear. If the marks are obscured by the oil, the oil is too dirty and should be replaced immediately. 3. Pouring Test: Take a small amount of oil from the oil pan and pour it into a container, then slowly pour it out. Observe the oil's gloss and viscosity. If the oil flows in a fine, even stream, it is free of gel and impurities and can be used longer; otherwise, it should be replaced.
Regarding Idemitsu 0W-20 engine oil, I've used it in many cars, and the severity of its degradation depends on specific usage conditions. Full synthetic oil has strong resistance to degradation, especially in urban commuting with frequent short trips and idling, where the oil tends to thin out faster and its lifespan shortens. However, if you do more highway driving at constant speeds, degradation is much slower. Idemitsu itself has excellent additives, with good oxidation resistance and cleaning performance, so overall it degrades much slower than mineral oils. I recommend following the manufacturer's maintenance manual and changing the oil every 5,000-8,000 km—don't delay too long. You can regularly check the dipstick; if the oil turns dark black or has a burnt smell, it means degradation is accelerating, and you should change it immediately. Idemitsu offers high cost-performance, and under normal driving conditions, degradation isn't too severe. Additionally, high temperatures have a significant impact—engine oil's protective properties decline faster in summer. Remember, regular maintenance is key—don't skimp on this expense.
