Originally Posted by NastyBuzzard
I'm pretty sure if its ester oil I can buy some to replace what's leaking, correct? Just how do you put it in?
No disrespect intended, but if you have to ask this question, you should not attempt to perform any service on the pressurized portion of the AC system.
You can't just "add oil" like an engine. The lubricant is carried with the refrigerant, and if oil is leaking, the R134a is likely leaking as well.
When you turn the AC on, if the compressor does not kick in, or starts but cycles off and on, it is low on charge and needs to be serviced by a shop that can properly evacuate the system, repair the failed components, and install the proper quantities of lubricant and refrigerant.
Hopefully, you will only need a new compressor and accumulator/dryer. If the old compressor failed, then it shed parts into the system.
The evaporator can likely be flushed, but modern condensors are not easily flushed. The orifice tube will also need to be replaced.
Budget around $1000 and you should get a couple hundred back if the compressor needs to be replaced.