What are the hazards of engine oil with high PAO content?
2 Answers
The hazard of engine oil with high PAO content is that it can easily cause engine seizure. Overview of engine oil: Engine oil, also known as engine lubricant, has an English name of Engine-oil. Its density is approximately 0.91kg×10 cubic. It can lubricate and reduce friction in the engine, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption. Composition of engine oil: Engine oil consists of two parts: base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties. Additives can compensate for and improve the shortcomings of the base oil's performance, giving it certain new properties, making them an important part of lubricating oil.
I once used a high-PAO synthetic oil in my own car, thinking it would boost performance. But after a few months, the seals started aging and leaking. The mechanic explained that PAO oil can accelerate shrinkage on certain materials, leading to seal failure, which cost me extra in repairs. What's worse, high-PAO oils are expensive—more than double the price of conventional oils—making them a waste for daily commuter cars. A friend with an older car also used high-PAO oil and ended up with increased sludge deposits because the detergents didn’t fully blend. Now I stick to the manual’s recommendations—conventional oil is safer and hassle-free, without those compatibility issues. Don’t chase novelty at the expense of your wallet and engine longevity.
