R12 was in use up until the 90's when R134A was introduced. I believe R12 was phased out at the end of 94, And R134A took it's place from 95 on. I hope that's the answer you're looking for.
It was built with R12, can be coverted to R134aIt was built with R12, can be coverted to R134a
Mineral oil is used with all R12 systems.
The cost of R12 varies a great deal. The use of R12 is illegal in some places and requires certification in others. It is estimated that a pound of R12 currently costs approximately $20 US dollars.
First of all, you don't use R12. Rather, R134 which has the oil included.
They didn't use R12 in 1995 - they'd all gone to R134a by then. Which is fortunate for you, because you can't even buy small cans of R12 without Section 609 certification.
If if it a 1995 or older then it came with R12 installed. 1996 can be R12 or R134. 1997 up, it has R134/R134a. If you suspect it had R12 look for a label somewhere on the A/C unit signifying it has been converted. If you find it has R12 and is leaking and needs repairing, after the leak is repaired, convert it to R134a. R12 is far too expensive to use.
R12
r12
r12 or 134a
Would have been built for R12, can be converted to R134a.
r12 but get a 134 kit and change it over for about 35.00 (wallmart) you have to be a regesterd mecanic to get r12