If your using a Classic Air system why are you using R12, they are designed to use 134? You can buy 134 a lot cheaper than 12 and don't need a license to buy it. Your question is confusing because you ask about 55 & 56 AC systems and in the same sentence refer to Classic Air voiding its warranty?? -------Original Message------- From: Jonnie Date: 6/20/2011 10:25:50 AM To: chrysler300@xxxxxxxxxxxxxxx Subject: [Chrysler300] R12 A---collant Has anyone out there had any experience with R12A DURACOOL-----in the older 55-56 type AC systems ? there is a guy here in the Akron, Oh. area who is selling it and tells me it will work----however Classic Air tells me it will void my warranty should I use it---they say there is not enough info about it -----Thanks------Johnnie Slayton [Non-text portions of this message have been removed] [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/