
10
Oils in comparison
Type of oil Application Notes
PAG oils
for refrigerant R134a
There are various PAG oils with different flow characteristics (viscosities) for use with
refrigerant R134a. PAG oils are hygroscopic. This means that cans do not have a long
shelf life once opened.
Standard PAG oils are not suitable for refrigerant R1234yf
or for electrically driven air conditioning compressors.
PAG YF oil
for refrigerants R1234yf
and R134a
There are also various PAG oils with different flow characteristics (viscosities) for use
with refrigerant R1234yf.
What makes these PAG oils from the BEHR sales brand special is that they are not only
suitable for use with the refrigerant R1234yf but can also be used with the refrigerant
R134a. As PAG oils are hygroscopic, cans do not have a long shelf life once opened.
PAG YF oil is suitable for both R1234yf and R134a
refrigerants.
PAG SP-A2 oil
for refrigerants R1234yf
and R134a
For use in electrically driven air conditioning compressors that have been filled ex works
with a special PAG oil.
PAO68 oil
for refrigerant R134a, and
in some cases for refrigerant
R1234yf and others
Can be used as an alternative to the various PAG oils that are offered for R134a (has the
advantage of being nonhygroscopic—i.e., in contrast to other oils, it does not absorb
any moisture from the ambient air). The two different PAO68 oils offered by MAHLE
under the BEHR sales brand (AA1 and AA3) can be used in conjunction with numerous
different refrigerants (see product overview).
The clear version of PAO68 AA1 oil (without
leak detecting agent) can also be used with the
new refrigerant R1234yf as well as in electrically
driven air conditioning compressors in Hybrid
and electric vehicles.
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