Add oil to A/C?

[Percival P. Cassidy]

I sometimes get a few seconds of screeching noise a little while after
driving off in the mornings, and I *think* it might be from the A/C
compressor. Is there any way of adding oil to the system other than by
draining, recovering the refrigerant, and recharging?

Perce

[Ashton Crusher]

Yes there is but I suspect the noise you are hearing is the belt
slipping first thing in the morning when it's cold. I doubt your AC
needs any more oil. Unless there is evidence of the AC oil leaking
out it surely doesn't need more. If it is actually the compressor
internals making a screeching noise when it first starts up it's too
late to save it anyway.