Which is Better, Full Synthetic Oil or Mineral Oil?

[HarperLee]

Full synthetic oil is better than mineral oil. The advantages of full synthetic oil are introduced as follows: Low Evaporation Loss of Full Synthetic Oil: Full synthetic oil is a pure compound with a narrow boiling point range, and its evaporation loss is much lower than that of mineral oil, which can reduce fuel consumption, decrease exhaust emissions, and extend the service life of catalytic converters. In addition, compared with traditional mineral oil, synthetic oil also has excellent chemical stability, good radiation resistance, high oil film strength, and low foaming characteristics. Therefore, high-end cars generally choose synthetic oil. Strong High-Temperature Oxidation Resistance of Full Synthetic Oil: The thermal oxidation stability of full synthetic oil is much better than that of mineral oil, meaning it has a lower tendency to produce acidic substances and sludge due to oxidation. Under various harsh operating conditions, it can provide appropriate lubrication and effective protection for the engine, thus having a longer service life and ensuring the performance stability of the oil over long-term use. In the same working environment, synthetic oil has a much longer service life than mineral oil, and its price is reasonable, offering relatively high cost performance.

[LaNevaeh]

I think this question depends on your driving scenarios and habits. For me, commuting in the city, fully synthetic oil is more suitable because it offers stable performance and a longer lifespan, lasting 8,000 to 10,000 kilometers before needing a change. The engine runs smoothly with less noise, especially during cold winter starts when it's less likely to thicken. Mineral oil is cheaper, but it needs to be changed every 5,000 kilometers and degrades faster. In the long run, the combined cost of oil and labor doesn't save much. For a new car, I'd recommend going straight to fully synthetic oil to protect the engine from wear. If you frequently take short trips or make frequent stops, mineral oil can still manage, just don't expect it to hold up well under prolonged high temperatures.

[BrielleLee]

As a car enthusiast, I've tried different engine oils, and the advantages of full synthetic are quite evident. It maintains strong oil film resilience under high speeds or heavy loads, enabling better engine temperature control while reducing wear and noise. During long-distance trips, I've extended oil change intervals to 10,000 kilometers, saving on maintenance frequency. Although mineral oil is cheaper, it oxidizes and darkens easily under high temperatures with poor cleaning performance, feeling inadequate when driving mountain roads or frequent acceleration. Of course, vehicle type matters: performance cars must use full synthetic; for older cars driven gently, mineral oil is cost-effective. Never neglect regular oil level checks—quality oil keeps your car youthful.

[StCody]

From an economic perspective, mineral oil is more cost-effective. I always pay attention to the budget. Mineral oil is cheaper, saving dozens of dollars per oil change, and changing it every 5,000 kilometers is not a hassle. For regular family cars not driven in extreme conditions, it's completely sufficient. Fully synthetic oil is much more expensive, and although it may last longer, it doesn't make much difference for older cars. My neighbor has been driving an old car for over a decade, sticking to mineral oil, and the engine still runs fine. Just don't slack on the oil change intervals or push it in high-temperature environments. Don't fall for the sales pitch about upgrading—simple maintenance is worry-free and budget-friendly.