A/C Dial

Idemitsu In Your A/C System

You may think the only Idemitsu lubricants running through your vehicle are engine or powertrain related. There may be another Idemitsu product in there. It is the one that’s helping to keep you and your passengers cool and comfortable.

Changes in the US Environmental Protection Agency’s Significant New Alternatives Policy (SNAP) have led to the adoption of HFO-1234yf refrigerant. This new refrigerant is more environmentally friendly than the previously used HFC-134a refrigerant. Automakers are making the switch from HFC-134a to HFO-1234yf well before the regulation compliance deadline in 2021.


Because HFO-1234yf has lower global warming impact and is more ozone-friendly. Idemitsu’s unique “Double-End-Capped” PAG technology is used to create a non-reactive lubricant that offers stability to an unstable HFO-1234yf refrigerant. In short, the technology creates a better product that delivers the following benefits:

  • Excellent wear protection for longer compressor life
  • Chemical and thermal stability resulting in longer service life
  • Proper miscibility with new HFO-1234yf and older HFC-134a

Those benefits are proof-positive. Idemitsu PAG oils are used in 90% of OEM compressors worldwide.