Engine oil is a fluid that is poured into the oil pan and flows over surfaces to help prevent friction and corrosion. It also prevents contaminants from reaching the internal parts of your car. Choosing the right engine oil can make a big difference in your car's performance. You can choose from several different types of oil based on the type of vehicle you have انواع روغن موتور.

Traditionally, engine oil was made from vegetable or animal fat. Over the years, however, the industry has changed dramatically. Now, most motor oils are manufactured from a heavier petroleum hydrocarbon base stock.

In addition to a thicker base stock, motor oil contains additives, such as detergents, that increase the fluidity of the oil. These additives can also be used to help keep the internal parts of the engine clean. The additives can be grouped into four groups, namely, viscosity index improvers, anti-wear additives, friction modifiers, and antioxidants.

A higher viscosity index number indicates a more stable, fluid oil that retains its viscosity over a wider temperature range. Higher viscosity oil can allow you to drive longer between oil changes. However, it also means that you can lose more lubricant and fuel over time. This can cause problems with your car's efficiency, particularly if you are not driving a vehicle that is suited for the particular type of oil you use.

Motor oils come in different grades, which determines their viscosity and other properties. Each of these grades comes with its own set of rules. The first rule is that the lower the viscosity, the less resistance it has to flow when it's cold. That's why thinner oils are recommended in colder climates.

Some oils have special additives that help reduce the chance of leaking. They also have properties that can make them more durable. For example, synthetic engine oil can be made to withstand high temperatures. Also, synthetics can be produced with low volatility, making them ideal for a variety of conditions. Synthetics are more expensive than conventional oils, but they are a step ahead in sophistication.

Several independent bodies set standards for the oil industry. The American Petroleum Institute (API) is one of them. If you see an API starburst symbol on your oil container, it indicates that the oil has been approved by the API for minimum standards. Choosing a product that is rated by the API can help ensure that your engine will run properly.

Another standard is the Winter Test. This test measures the viscosity of the oil in a cold climate. Lower winter test numbers indicate better cold performance. On the other hand, higher winter test numbers indicate better high-temperature performance روغن موتور.

When selecting an oil, you should consider the type of your vehicle and your local climate. It's also a good idea to have a mechanic help you decide which oil grade is best for your vehicle. He or she will be able to tell you when you need to switch from one grade to another.