A 95 should use R134a. The schrader valves will tell you - if they're threaded on the outside, they're for an R12 system (in which case, if you're not the original owner, I'd recommend you do a system purity test to see if it's still using R12 or if it was retrofitted for R134a). If they're the quick connect type, they'll be for an R134a system.
I would recommend 5w-30
PAG oil goes in the air conditioner compressor. It is added in the same place as the refrigerant. However, this oil must be added before the lines for adding the refrigerant are put in place.
in almost all vehicles since 1995 take 134A
134a is the refrigerant used by most vehicles made after 1995
A tag under the hood should tell what type of refrigerant and how many ounces it uses.
Is it a new or an old window unit? Assuming your looking to refill it I will assume it is an old window unit which most likely uses R-22 refrigerant. R-22 is an ozone depleting refrigerant that is being phased out but should be available until 2010. There should be a label on the window unit stating which refrigerant is used.
It is normal for it to cycle on and off. If, however it is cycling on and off rapidly then your system has a leak and is low of refrigerant. Have the leak repaired and the system recharged by a professional.
R134A
If you have the selector knob on defrost it will also run the air conditioner compressor.
It has a leak and is low of refrigerant. Take it to a professional for repair and recharging. Not a DIY job. I had this problem and found that the wiring hooking to the clutch and the pressure switch were broke and intermittently connecting.
r134
134a