No, the two cannot be blended.
AnswerNO! The problem is that the lubricating oils are not compatible, and the mixture will clog the system.
The newer Freon (r134) does not mix with the old Freon. The system needs to be flushed, special oil added so that r134 will be compatible with the system gaskets, then a vacuum pulled. Then the Freon can be added.
R134 .... IS freon.
You do not want to buy Freon as it is very, very, expensive. Have the leak repaired, the system purged of all Freon R12 and the oil. Have it converted over to R134 refrigerant. You cannot just add R134 as the oil used in R12 is not compatible with R134. You will be money ahead by converting it.
R134
R134
THERE IS NO FREON IN A 98 IT IS R134
They should never be mixed.
You can't get freon anymore. You need to go to an auto store and ask for a refrigerant that is compatible with a freon system. what you need is a retro kit from your local auto parts . Just go in to an auto parts store you feel comfortable with and tell them you need to update your a/c system to r134. and they will direct you to a retro kit, it has a compatible cryogenic liquid charge (freon) in it that will allow your system to run on r134 that you can by at the auto parts and do it your self . No ripp-off repair shop needed.
1993-95 for most.
R134