Why is the Audi A5's air conditioning noise so loud?

[ElizaMarie]

Audi A5's air conditioning noise is loud due to insufficient refrigerant oil. Here is an introduction to the related oil content: 1. Increased fuel consumption: When adding engine oil, the oil level should be between the upper and lower limits on the dipstick. If too much oil is added to the engine, the oil volume will expand as the engine temperature rises, increasing the pressure in the oil chamber and operational resistance, leading to reduced vehicle power and increased fuel consumption. 2. Overfilling oil: If too much oil is added, the crankcase breather pipe may leak oil, increasing crankcase pressure. This can cause the oil seal to loosen under oil pressure, leading to oil leakage. 3. Heat dissipation: Overfilling oil can affect engine heat dissipation.