How much refrigerant oil???

[Booie]

Anybody know how much refrigerant oil goes in my 79 AC system a line broke and oil went all over.now I need to refill and recharge system.

 

[wishuwerehere82]

If you have already converted to R134A refrigerant, they have a mix of freon and oil in a can that you can use for your first refill. After that use the straight R134A to fill to the proper charge.
If you haven't converted from R12, you will have to replace it with Freeze12 or another substitute.
The system uses about 7 Oz of oil per total charge.

 

[Booie]

No I didn't convert and I was going to have the R-12 put back in Iwas told it is a lot colder than R134A. But didn't know how much oil it takes. Just 1 oz. Total or 1oz. per pound of R-12
Bruce

 

[6880 Mike]

The AC shop you will use to refill your system will know how much oil to use.

 

[Booie]

I can get done for free at work but they need to know how much oil. Thanks

 

[wishuwerehere82]

Here's the NAPA chart for refrigerant charges, but it doesn't list your model year
But they may be able to determine the oil percentage depending on the volume of refrigerant charge.
http://napabeltshose.com/news/index.cfm?location_id=1078&id=1517&show=newsitem

 

[bradfordsvettes]

I would not add more tha a couple of ounces. If there is to much oil than there is not enough room for freon and the system will not work properly.You probably did not lose as much as you think but with the age and failure 2 ounces should be plenty just my 2 cents Steve

 

[Booie]

Thanks Steve that should help alot. Bruce