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Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 1274 (General, Technical Data (Refrigerant R134A Servicing)) >> 00 General, Technical Data >> A/C System, General Information >> Refrigerant R134A Characteristics >> R134A Physical Characteristics

R134A Physical Characteristics

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The vapor pressure curves of R134a and other refrigerants are sometimes very similar, therefore it is not possible to make a certain distinction solely by pressure.

With R134a, the A/C compressor is lubricated with special synthetic refrigerant oils, for example. PAG oils (polyalkylene glycol oils).