GM A6 Compressor Oil

[chuckwp]

Looking for confirmation. GM A6 compressor using R-134 takes PAG 150, 10.5 oz? Is that total system capacity? 69 Camaro, factory system.
Also, is it filled through the suction port?

[JohnHere]

The GM A6 compressor takes between 10 and 11 ounces of oil (total system capacity), with some Corvettes using a slightly smaller A6 displacement-wise, IIRC. So you're in the ballpark, so to speak, with your '69 Camaro factory system. PAG 150 works, as long as you're starting with a clean system containing no mineral oil residue. The A6 has a sump and is drained and filled via a plug on the side.

Don't forget about the POA valve. You're converting to R-134a, so you'll need to re-adjust the POA to about 26 PSI. Otherwise, the system won't perform satisfactorily.

[bohica2xo]

A6 compressors have an oil sump, and a gearotor type oil pump.

OIl should be placed in the sump of the compressor on the bench.