your car being a 95 I believe it is a 134 system. My understanding from school was the pag oil in 134 system will be destroyed when it comes in contact with r12. Im not 100% but I would just suck it down and recharge with 134. Wait a few years and 134 will be gone and repalced with HFO-1234yf which is a Dupont product I think. Its already being used in Europe. And from what I hear its heavier then air and ALSO flammable.
BTW why are you recharging the system? if its low or blowing warm, then it will need a repair prior to proper operation.