Not sure why this is diverging into a politicing over R12... There are enough other threads to discuss that stuff. My system was designed for R-12, and it is cheap enough and Im willing to pay even if it wasnt, for the right stuff to be used. Im not putting some hydrocarbon in there, not am I intending to fill with 134a.

All this is about is what I can do to be proactive on a 30 year old AC system which obviously was tight for years and an extended sitting period caused it to leak out. Just trying to capitalize on the lack of refrigerant in there to do as much as I can.

BTW, I have my 608/609 license, and may consider doing this repair correctly myself instead. Good excuse since there is nothing to recapture prior to starting, unless I use a nitorgen/R22 mix for troubleshooting.

So it may be good time to invest in a decent size bottle of R-12. Where can I get the best deal?

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Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)