What type of fuel should an Audi A7 use?

[MacJeffrey]

Audi A7 should use 95-octane gasoline. The specific type of fuel required is clearly indicated in the owner's manual of each vehicle. Using higher-octane fuel in a low-compression engine can easily cause carbon buildup in the engine. Conversely, using lower-octane fuel in a high-compression engine may lead to knocking due to insufficient anti-knock properties of the fuel, ultimately causing engine failure. Below is an introduction to the functions of engine oil: Lubrication and Wear Reduction: There is rapid relative sliding between the piston and cylinder, as well as between the main shaft and bearing bush. To prevent excessive wear on parts, an oil film needs to be established between the two sliding surfaces. A sufficiently thick oil film separates the surfaces of the relatively sliding parts, thereby reducing wear. Cooling and Temperature Reduction: Engine oil can carry heat back to the oil tank and dissipate it into the air, helping the radiator cool the engine. High-quality engine oil can carry carbon deposits, sludge, and worn metal particles from engine parts back to the oil tank through circulation, washing away contaminants generated on the working surfaces of components via the flow of lubricating oil.