Oil for R12
 

Hi Board and friends. I am returning to R12 on my 350SD-1991. What oil should I use in a Nippondenso 10PA17C with R12 freon? I know PAG-46 is recommended with R-134, but I need to know if I should use some specific mineral oil, or if there is something better. Thanks in Advance.

Certainly not PAG.

Pretty sure these all took mineral oil.

You're going to have to do a full flush if you are reverting to r12.

Some folks suggest switching to POE oil after a full flush, but I have no experience with it.

Thank you Csnow
 

I hope that the mineral oil have some kind of compatibility with the previous oil used in my system, because I was told that the compressor can not be flushed, only drained and I wonder how many days I have to leave it hanging to drain all the remaining oil. Thank you for the answer, I am planning to do a full flush of everything I can flush. There is a hose with a muffler or something that I can't, but the other hoses, the evaporator and the condenser will be flushed. Thank you again.

Darrel