What is the difference between full synthetic and mineral engine oil?
2 Answers
The difference between full synthetic and mineral engine oil is: 1. Different composition: Full synthetic oil is artificially synthesized; mineral engine oil is based on petroleum-refined mineral oil with additives. 2. Different vehicle applications: Full synthetic oil is suitable for vehicles with turbocharged engines, SUVs, and large-displacement cars; mineral oil is suitable for micro, compact, and economy vehicles. The functions of engine oil are: 1. To separate the sliding surfaces between pistons and cylinders, crankshafts and bearings, reducing component wear; 2. To carry heat back to the oil pan for dissipation into the air, assisting the radiator in cooling the engine.
I've been driving for almost thirty years and have used all kinds of engine oils. I can tell you there's quite a noticeable difference between full synthetic and mineral oils. Mineral oil is directly refined from crude oil—it's more basic and cheaper, suitable for older cars or just regular city driving. However, it's slower to start in cold weather, the engine tends to creak, and over time, it's more prone to carbon buildup and wear. Full synthetic oil, on the other hand, is artificially synthesized with more uniform and pure molecules, offering much better low-temperature fluidity—it starts smoothly even in winter. It also has superior high-temperature resistance and anti-wear properties, providing better engine protection during high-speed driving or heavy loads, and the oil change interval can be nearly doubled. That said, it costs several times more than mineral oil. So, if your car isn’t too old or you often drive in extreme weather conditions, I’d recommend going with full synthetic—it’s more cost-effective in the long run.
