Too much oil in my AC?

[tinypanzer]

Hi everyone.....

Quick question... My '90 300SE has been retrofitted to R134a by a dealership before I bought the car. Last night, I hooked up a pressure gauge to the low side, and after adding a touch of refrigerant, I removed the gauge. The Schrader valve malfunctioned, and started venting my charge quite rapidly.

Afterwards, there was oil everywhere. Nasty smelling stuff.

Anyway, how much oil would you normally expect to come out of the low side in such a situation? I feel like there was waaaay too much oil and that perhaps my system is over-oiled.

I've already replaced the valve and re-charged the system. Works about as poorly as it used to, which is to say that cooling is marginal at best, and non-existent at idle.

Any hunches?

Thanks!