ac r12 or 134a
#2
RE: ac r12 or 134a
The 93 still used R12. However; you can save a lot of money by using R12 substitutes such as Freeze12, which costs about the same as R134a, and does not require any modifications or oil change to the AC system.
#8
RE: ac r12 or 134a
Should be easy to figure out. If you had a recharge kit for 134a, it wouldn't fit on an R12 system. The schrader valves are different sizes between the two so that one can't be accidentally put into the other. There also should be a sticker somewhere under the hood indicating which one the car has.