If a 94 Olds Royal had R12 and no longer cools could you now get use Freeze 12 supposedly bridge product between R134 just put it in without doing anything else in?

It is not recommended to use Freeze 12 in an R12 system without making any modifications. Freeze 12 is a blend of refrigerants that is intended to be a temporary replacement for R12 in systems that have not been converted to R134a. However, it is not a long-term solution, and it can damage the system if it is used for too long.

If your 1994 Oldsmobile Royal is no longer cooling, it is best to have it diagnosed by a qualified technician to determine the cause of the problem. If the problem is a leak in the refrigerant lines, it will need to be repaired before any refrigerant can be added. If the compressor has failed, it will need to be replaced.

Once the problem has been repaired, you can then decide whether to have the system converted to R134a or to use a temporary replacement refrigerant like Freeze 12. If you do choose to use Freeze 12, be sure to follow the manufacturer's instructions carefully.