R12 unless it's been converted.
R134a
134a
R134a
R12
R12
R-134 Refrigrant.
R134a freon.............
R-12
134A 134A 134A
what type of engine do you have?? V6
It was built to use R12, but can be converted to R134a
It will be on the compressor also the quantity needed to fill it if it is completely empty. It is 134.