Please Advise on total amount of AC oil needed

FStanley

Not-quite-so-new-guy
Apr 25, 2016
17
2
3
I have a 1979 Olds Cutlass. I have all new AC components. I am using an R4 compressor with R12 freon.

The way I read the factory manual for 525 Minerial Oil for each component is:

6oz Compressor
3oz Evaporator
1oz Accumulator
1oz Condensor
________________
11oz total
Does this seem reasonable?
What experiences have people had? and how much oil did you use and install it???

Thanks
Fred
 

69hurstolds

Geezer
Supporting Member
Jan 2, 2006
8,026
17,105
113
Seems like a lot.

Too much oil, IMHO.

Typically it’s 6 oz. total if you go by the label on the compressor. At least it is in mid-80s Cutlass.

The manuals give you oil amounts if you’re just replacing one component. At least the 84-87 manuals do. It can get confusing because if you add them up separately it’s more than what the label calls for.

3 oz. in compressor, 2 oz. in accumulator and 1 in the evaporator. You probably could go 2 oz. in the evaporator if you wish for a total of 7 oz. But I’d not go more than that.
 
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oldsofb

Royal Smart Person
Supporting Member
Dec 7, 2007
1,354
3,877
113
Maryland
I think the total system capacity is between 6-8 oz. There are charts out there on the inter-webs.

Hutch
 

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