Most US vehicles before 1994 were R12, so the car will need to be retrofitted.
R134
R134 .... IS freon.
R134
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
THERE IS NO FREON IN A 98 IT IS R134
They should never be mixed.
It came from the factory equipped with R12 Freon. I suggest you convert it to R134 Refrigerant. R12 is no longer produced and is very expensive if you can find it.
1993-95 for most.
R134
R134
If it hasn't been coverted to R134 it will have to beBuy a kit at Wal-Mart or auto parts comes with instructions