What oil vescocity do i get for the a/c compressor for a 92 es300?

 

You need refrigirant oil for R-12. Some manufacturer got the oil that can be use on both R-12 and R-134.

 

I think you are using R12, check the label in the engine compartment.

For Model 90-93 Lexus

R12 =ND-OIL 6 (P/N 88899-28040)
R134A =ND-OIL 8 (P/N 08885-09109)

If you want to buy generic

R12 uses mineral oil
R134A take PAG oil, this oil absorbs water quickly so it should come from a sealed container.