Refrigerant System Service Basics (R-134a): Notes

WARNING: This page is about a different car, the 2017 Kia Niro. However, it is still accessible from the selected car via links, so may be relevant.

For the electric compressor using high-voltage, use POE oil with high insulation property.
Use a separate equipment (refrigerant recovery/charger) exclusive for hybrid vehicle maintenance to prevent infusion of PAG oil of non-hybrid vehicles during refrigerant recovery/charging.

WARNING: If PAG oil mixes into the POE oil of the system, dielectric breakdown may occur due to decreased volumetric resistivity and the A/C compressor may not work.