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Not without converting the system to R-134a and replacing the compressor oil.
The refigerant gas 134a is used in the evaporator and condensor and many brands of 134a contain ester oils, so yes.
All 134a Refrigeration systems use polyester oil. You'll need to find polester oil for automobiles.
You can use up to 21oz of R-134a. But don't forget if you are needing to add R-134a you will also need to replace some of the oil also.
10 years ago they kept telling us that replacing R12 a/c system with 134 gas was not recommended because will destroy the compressor and so on, I have retrofitted all my vehicles to 134A with no negative consequences ,so I believe it can be done Just have to evacuate the system totally and remove the oil from the condenser,evaporator and receiver dryer(Filter) and add the recommended oil for 134A gas .
Unless your system has been convert to take R-134a you would need 25oz of R-12. If your system has been convert to R-134a you would use 20oz to 21.25oz of R-134a.
If your system is totally empty you will use 28 oz of R-134a. If you are topping off the system you should fill to the correct PSI level. You can find a Pressure Chart on the link below. Look on the Diagrams and Specs then the R-134a System Pressure Chart.
There are two ways. The old R-12 A/C's have a "screw thread" style service fitting for adding refrigerant. These resemble a tire valve. R-134A systems use a "quick connect" type fitting with no external threads. These fittings are on stock R-134A and R-12 systems that have been retrofitted to R-134A. The purpose is to prevent someone from charging R-12 into an R-134A system and vice-versa. Also, retrofitted A/C's should have a label saying "Retrofitted to R-134A," or something to that effect. The label should also say the freon charge weight and type of oil in the system, usually a polyol ester oil (POE or ester) in retrofitted systems and a polyalkylene glycol (PAG) in stock R-134A systems. Look for both the "quick-connect" style fittings and retrofit labels on the vehicle in question.
134A 134A 134A
R-134A is what you use to re-gharge the a/c system
Only if you replace the Dryer, install adapters on the lines, and use compatible oil.
You need to have a vacuum inside your system before it will accept any R-134a. Your local shop should be able to do this for a small fee. YOU CANT ADD IT IF YOU DO NOT CHANGE THE OIL. The oil in 134a is different then the oil in r12. If you do use it as a replacement with out changing the oil the oil will thicken up and clogg your metering divice. but you can by a retro kit first