What is car engine oil made of?

[MacLeilani]

Car engine oil is composed of the following components: 1. Base oil: Engine oil can be simply divided into mineral oil and synthetic oil based on the difference in base oil (vegetable oil is not included due to its scarce production). Synthetic oil is further divided into: full synthetic and semi-synthetic. The base oil of car engine oil is mainly divided into two categories: mineral base oil and synthetic base oil. Mineral base oil is widely used and accounts for a large proportion (about 95% or more). 2. Additives: (1) Pour point depressant: It can optimize the flow performance of the oil at low temperatures. (2) Viscosity index improver: It is an additive that increases the high-temperature viscosity of the oil and reduces the low-temperature viscosity. (3) Detergent dispersant: Its functions can be divided into four aspects: acid neutralization, solubilization, dispersion, and washing. It can keep the engine clean, making the generated insoluble substances in a colloidal suspension state, preventing the formation of carbon deposits, paint films, or sludge.

[Jodi]

I've always been driving this old car, and engine oil is the liquid used to lubricate the engine. It's mainly made from base oil refined from petroleum, with some special additives like anti-wear agents and detergents to protect the engine from wear. My old car used to stall when the oil wasn't changed on time and got dirty. Later, I found through regular checks that fully synthetic oil performs better, and the added chemicals can extend its lifespan. The quality of engine oil can be seen from the label—numbers like 5W-30 indicate viscosity. Choosing the wrong one can increase fuel consumption. I suggest new drivers should also learn about this and not just wait for the repair shop to remind them. When changing the oil yourself, tighten the oil pan screw properly to avoid leaks and wasting money.

[LeLawson]

As a car enthusiast, I find engine oil really fascinating. It's composed of base oil and a bunch of additives. The base oil is divided into mineral oil and synthetic oil - the former comes from petroleum, cheaper but less efficient, while the latter is artificially synthesized with better high-temperature resistance. The additives include antioxidants and corrosion inhibitors to protect the engine from damage during high-speed operation. I've found that full synthetic oil is better for racing, as reduced friction makes acceleration more exhilarating. Engine oil also has cleaning properties, trapping dust to keep the system clean. Don't overlook the oil filter - change it along with the oil. Last year when I upgraded my beloved car, I installed new engine oil and it ran much smoother. Remember to check the viscosity grade - use higher viscosity in summer to prevent overheating.

[StAlessandra]

When I first started driving, I was curious about what engine oil was. It turns out it's made from a blend of oils, with the main component called base oil, refined from crude oil, and then mixed with additives. It acts like a protective film to keep the engine running smoothly. It doesn't just lubricate; it also cools and seals, preventing overheating and seizing. I once encountered an oil discoloration warning because the additives had degraded, and that's when you need to change the oil to stay safe. Don't skimp by using low-quality products, as they can easily damage the engine. Checking the oil dipstick is simple—just monitor the fluid level regularly yourself and top up or change it as needed, saving money and giving peace of mind.

[CaydenMarie]

In my auto repair practice, engine oil is primarily composed of base oil and additives. The base oil can be derived from mineral or synthetic sources, while the additives contain cleaning and anti-wear components to prevent excessive friction between engine parts. Don't underestimate the role of additives—their absence can lead to sludge buildup and system clogging. I often see car owners choosing the wrong viscosity, such as using 10W-40 in cold weather, when switching to a lower viscosity can save fuel. Engine oil also plays a crucial role in sealing the cylinders; oil leakage is a sign of seal failure and requires immediate attention. Don't exceed the recommended mileage for oil changes, and combine it with regular maintenance to keep the vehicle in good health.

[White]

At home, we often use the car for daily commuting, and engine oil is a necessity. It's synthesized from petroleum-based base oils with added chemical protectants to reduce engine wear and save money. Base oils make up the bulk, and cheaper mineral oils are sufficient, but semi-synthetic oils with better additives are more durable. When choosing a brand, pay attention to certification standards, such as higher API ratings for reliability. Once, I forgot to change the oil and heard a gritty sound while driving, which gave me a scare. Fuel-saving tips rely on maintaining the correct oil viscosity—don’t mix in water randomly, top it up when the level is low, as it directly affects engine lifespan. Regular maintenance keeps family cars worry-free.