Got to replace the A/C compressor on an 88 GT. I bought the car after the system was retrofitted to R-134a. Whoever did the conversion did not install a label indicating what oil was used. Is there a test to identify what oil is in the system?
------------------ formerly known as sanderson 1984 Quad 4 1886 SE 2.8L 1988 4.9L Cadillac 1988 3800 Supercharged
