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How much ester oil?

442Bob on Tue July 15, 2008 2:20 PM User is offline

Year: 1970
Make: Oldsmobile
Model: 442
Engine Size: 455
Refrigerant Type: R134A

I am changing from R12 to R134A on my 1970 442. I have flushed the evaporator, hoses and condenser. I have replaced the drier and had the poa adjusted for R134A. I have flushed out the A6 compressor with ester oil. How much ester oil does the system take and where should it go? Should I do anything else before I have it charged? Thanks, Bob

iceman2555 on Tue July 15, 2008 2:30 PM User is offlineView users profile

A personal preference for this application would be a DEC PAG 150. This lubricant is more suitable to the viscosity requirement of the GM compressor.

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The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

442Bob on Tue July 15, 2008 7:34 PM User is offline

I will get some Dec Pag 150. I need to know how much to put in and where to put it all. Thanks

chris142 on Tue July 15, 2008 8:55 PM User is offline

Your A6 has a sump. It holds 10 or 11 oz per my memory.

I'd fill it then ad 4 or so to the lines.

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