Hi all: I am running a blend in my F. It is called FRIGC FR-12. If you search the internet you can find it. In my opinion, it cools every bit as good as R-12 and does not have the toxic qualities of R-134a. It is about half R-134a and the rest is made up of some other gases. All you need to do to prepare your system is to add a couple of ounces of ester oil. Uses the same equipment as R-12. No flushing necessary. Dan Reitz Bell Canyon, CA In a message dated 2/12/2013 8:55:09 A.M. Pacific Standard Time, m.hopkins@xxxxxxx writes: Hi all - has anyone with a 1961 or earlier air conditioned Mopar had any experience running R134 in the early '57 to '61 compressors? I've been told they can only run on R12. R12 is illegal and unavailable in Canada. (Consistent with the left wing leanings of our governments, the fines for possessing R12 are higher than the fines for possessing crack cocaine........) I run R134 without any problem in my '66 Charger, so the new '66 300 should be OK too. The concern is with the earlier A/C unit in my 300F. Mark in Calgary ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo! Groups Links [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: Chrysler300-digest@xxxxxxxxxxxxxxx Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/