Approved Refrigerant Oils

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Audi S6, 2018 Audi A6 Quattro, 2018 Audi A6, 2017 Audi S6, and 2017 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

The special refrigerant oil (for use with refrigerant R1234yf refrigerant circuits only) is no longer commercially available. Refrigerant oils specifically designed for refrigerant R1234yf and each compressor can therefore be obtained from the replacement parts program. Refer to the parts information.
The use of other refrigerant oils can lead to A/C system malfunctions. The stability and the chemical effect of other refrigerant oils not deigned for refrigerant R1234yf and the A/C compressor (which are not checked and approved) can lead to damage in the refrigerant circuit. In this way for example unsuitable refrigerant oil can prematurely aged when operating the A/C system, due to unknown residues in the oil or due to missing additive and can effect and damage refrigerant circuit components. The ability to mix and the circulation with refrigerant R1234yf for the lubrication of the A/C compressor in the refrigerant circuit is not always available.
Depending on the manufacturer of the A/C compressor different refrigerant oils are approved for the respective A/C compressor, for this reason pay attention to the correct allocation. Refer to the parts information.
For Audi the current refrigerant oils are used: for vehicles with a "Sanden" or "Delphi/Mahle" A/C compressor the refrigerant oil part number G 052 535 M2 (external name SP A2). For vehicles with a "Denso" A/C compressor the refrigerant oil part number G 055 535 M2 (external designation ND 12). Refer to the parts information.
Additional information can be found in the vehicle-specific repair information. Refer to APPROVED REFRIGERANT OILS AND REFRIGERANT OIL CAPACITIES [For engine(s) CTUA, CAED, CREH, CEUC, CTGE, CREC, CYNB, CPNB] (vehicle-specific repair information).

NOTE:

The specification about the usability of the refrigerant oil is given on the bottle the refrigerant oil is delivered in.

This time specification does not need to be observed when the delivered bottle is tightly sealed.

Refrigerant oil from a delivered bottle that is tightly sealed can also be used after the time specified on the delivered bottle.