How many types of engine oil are there?

[FelixAnn]

There are 3 types of engine oil. Below is an introduction to the types of engine oil: Mineral oil: Mineral oil is a commonly used lubricant in the market. It is derived from the useful substances separated during the petroleum refining process, such as gasoline and aviation fuel, and then the remaining base oil is further processed and extracted. Semi-synthetic oil: Semi-synthetic oil is made from semi-synthetic base oil, which is a product of the purification of mineral oil through hydrocracking technology. It is a mixture of mineral oil and fully synthetic oil in a ratio of 4:6. The purity of semi-synthetic oil is very close to that of fully synthetic oil, but its cost is slightly higher than that of mineral oil. It is an ideal transitional product from mineral oil to synthetic oil. Fully synthetic oil: Fully synthetic oil is the highest-grade type of engine oil. It is derived from ethylene and propylene dispersed from natural gas or gas in crude oil, which then undergoes complex chemical reactions such as polymerization and catalysis to form a lubricating fluid composed of large molecules. Essentially, it uses the better components of crude oil, undergoes chemical reactions, and achieves the desired molecular structure under human control.

[DiAustin]

As a car enthusiast with several years of driving experience, I believe engine oil can be categorized into three main types: mineral oil, semi-synthetic oil, and full synthetic oil. Mineral oil is refined from crude oil, being the most affordable option, but offers average engine protection and oxidizes quickly, making it prone to deterioration. Semi-synthetic oil blends mineral and synthetic components, striking a balance between performance and affordability, which I recommend for daily drivers. Full synthetic oil is chemically synthesized, offering high-temperature stability and easy cold starts, making it ideal for long-distance driving or high-performance engines. I always refer to the manual's recommendations when changing oil—never compromise on the correct type to save money. Additionally, oil viscosity ratings like 5W-30 should match the climate to extend engine life. Regular oil changes every 5,000 to 8,000 kilometers are crucial, and delays should be avoided at all costs.

[McTravis]

With decades of driving experience, I can say there are basically three types of engine oil: mineral oil, semi-synthetic oil, and synthetic oil. Mineral oil is cost-effective but has poor heat resistance, making it suitable for older cars. Semi-synthetic oil offers the best balance of performance and price, being fuel-efficient and eco-friendly—I use it for city commuting. Synthetic oil is the most advanced, providing superior protection, ideal for high-speed driving or extreme cold regions. The key is to choose oil based on driving habits—for smooth driving like mine, semi-synthetic is sufficient; no need to blindly go for expensive options. The viscosity grade (SAE) must also match the manual—5W-40 suits most models. Maintenance tip: Follow the recommended mileage for oil changes. I stick to every 7,000 km, and my engine has never had issues. I’ve also helped others pick the right oil, saving them a lot of unnecessary expenses.

[FaithRose]

I prioritize green living, and engine oils are divided into three main categories: mineral oils are highly polluting and difficult to recycle; semi-synthetic oils offer a balance but have moderate emissions; fully synthetic oils are efficient, eco-friendly, and highly recyclable. I use synthetic oil to reduce my carbon footprint—it's better for the engine and has lower emissions. When choosing oil, consider both performance and environmental impact, and never dispose of used oil irresponsibly into rivers.

[DiSebastian]

In car repair practice, common engine oil faults include mineral oil, semi-synthetic oil, and synthetic oil. Mineral oil is inexpensive but prone to carbon buildup; semi-synthetic oil suits most vehicle conditions; synthetic oil offers stable high-temperature performance and strong protection. Issues often arise from using the wrong viscosity. It is recommended to match oil type with vehicle age: mineral oil for older cars and synthetic for newer ones. Timely oil changes prevent engine wear.

[ArcherMarie]

My family car is 10 years old. Engine oil types are divided into mineral oil, which is affordable but outdated; semi-synthetic oil offers good cost-performance and safety; full synthetic oil provides durability and excellent protection. When my child drives, I use semi-synthetic oil to save money and feel at ease. Following the manual to choose and change oil without exceeding 10,000 kilometers ensures engine health.