What is the oil specification for Audi A6L?

[Elaina]

According to the manufacturer's recommendations, the oil specifications for Audi A6L are Mobil 1 0W40 or Shell Helix gray series oil, either 0W40 or 0W30, which are also fully synthetic oils. Both Shell and Castrol oils are acceptable, but it is not recommended to frequently switch between different brands of oil. The amount of oil required for the six-cylinder Audi A6L mainly depends on the engine displacement, as different displacements require different amounts of oil. Below is an introduction to automotive oil: Composition: Engine oil consists of two parts: base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties, while the additives can compensate for and improve the shortcomings of the base oil, giving it new properties, making it an important part of lubricating oil. Selection of lubricating oil brands: If you prioritize the long-lasting performance of the oil, you can choose Mobil oil; if you care about the oil's cleaning ability for the engine, Shell oil is recommended; if you need lubricating oil with strong oil film toughness, you can choose Castrol. When changing the oil in the car, it is necessary to replace the oil filter at the same time. The oil filter is used to filter impurities, metal shavings, sludge, and other dirt in the oil. Only filtered oil can remain clean, extending the service life of the oil and the engine. If the oil filter is not replaced when changing the oil, the dirt remaining in the filter paper will contaminate the new oil when it passes through the oil filter, causing the new oil to turn black quickly. In addition, if the oil filter is not replaced for a long time, its filtering effect will significantly decrease, mostly failing to achieve the desired filtering effect. Long-term driving under such conditions will quickly wear out the internal components of the engine, and in severe cases, it may lead to oil burning. It is recommended to replace the oil filter when changing the oil. The viscosity of the oil will change with temperature, so special attention should be paid to its performance under low and high temperatures. For example, in 5W-30, the first number indicates low-temperature fluidity, with 5W representing the ability to withstand -30°C low temperatures. The smaller this number, the better the low-temperature fluidity, making cold starts smoother. The latter number represents the kinematic viscosity of the oil at 100°C. The higher the value, the better it can maintain viscosity at high temperatures, which can also be understood as better lubrication performance under high-temperature conditions. When selecting engine oil, the following precautions should be noted: Choose oil based on the engine's requirements. It is unnecessary to use overly advanced oil in engines with lower requirements, nor should lower-grade oil be used in engines with higher requirements. Multi-grade oil should be selected whenever possible. Due to its characteristics of being economical, long-lasting, and efficient, multi-grade oil provides better protection for the engine. Based on the characteristics of multi-grade oil, it may appear black prematurely and have lower oil pressure compared to conventional oil during use, which is normal.