Mazda RX-8 Workshop Manual page 2563

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2011 - RX-8 - HVAC
REFRIGERANT SYSTEM SERVICE CAUTIONS
Handling Compressor Oil
Use only DENSO OIL8 compressor oil for this vehicle. Using PAG oil other than
DENSO OIL8 compressor oil can damage the A/C compressor.
Do not spill DENSO OIL8 compressor oil on the vehicle. A drop of compressor oil
on the vehicle surface can eat away at the paint. If oil gets on the vehicle, wipe
it off immediately.
DENSO OIL8 compressor oil (PAG oil) has a higher moisture absorption
efficiency than the previously used mineral oil. If moisture mixes with the
compressor oil, the refrigerant system could be damaged. Therefore, install
caps immediately after using the compressor oil or removing refrigerant system
parts to prevent moisture absorption.
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