There are R-12 alternative refrigerants - non CFC based which claim to be compatible with R-12. In theory you can even use them for a top off. When these products claim compatibility of that they are certified for use in an R-12 system, that only means that they are environmentally acceptable - no guarantee of performance. I have not tried them. I guess if someone has gone to the trouble to mass produce and market the stuff it may be ok, but I vote real R-12. Tom 10902 -----Original Message----- From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On Behalf Of Marc Levy Sent: Monday, July 25, 2005 7:16 AM To: dmcnews@xxxxxxxxxxxxxxx Subject: Re: [DML] Re: Air Condition at Highway Speeds eco-friendly?? Never heard of such a thing. :) the PO probably switched from R-12 to R-134a.. More for financial reasons than environmental reasons, but that is a whole different discussion. If the system was not flushed, and oil replaced then it is possible you have damaged the compressor and clogged the system. R-134a also runs at higher pressures, and have seen other DML'ers discuss making other modifications to the system for conversion. I am not familiar with the details, because there has never been a good reason to convert. For anyone considering this now, check out the prices of R-12 vs R-134a. You will see, it is not worth it to convert... stick with R-12. --- geoff_ombao <geoff_ombao@xxxxxxxxx> wrote: > Interesting. The prior owner stated that he switched to the new > eco-friendly refrigerant. > Could this be causing the cycling? > > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/