Want this question answered?
There is only one type of freon, but before we go further, freon has been banned due to it's hazardousness to the environment.
One type of freon that you can use on a 1990 Ford Econoline is Four Seasons R12 Refrigerant Oil. The canisters cost close to $10 each.
Buy a kit at Wal-Mart or auto parts comes with instructions
R-134
It is still possible to aquire R12 Freon, but the cost is excessive. My advice is to convert the system to R134a.
A 1990 Cadillac Deville air conditioner should hold 46 oz. R12 Freon. This should be verified through the owners vehicle manual.
Check freon level first
It was built for R12, can be retrofitted to R134a
Was built for R12, can be converted to R134a.
Was built for R12, can be converted to R134a.
It was built with r12, it can be retrofitted to R134a.
The 1990 325i has a M20B25 motor. The earlier 1990 525i had the same motor, a M20B25, whereas the later 1990 525i had a M50B25.