Dont put any r134a in a r12 system unless it has a retro fit for r134a, there is no way i would vac out a r12 system with our r134a machine, you are asking for problems,, yes r134a will work great for a while you might be lucky and get a full year out of it, i agree with Martin stick the r12 replacment!!!! DOC UK Website: www.deloreans.co.uk Unsubscribe: doc-uk-unsubscribe@xxxxxxxxxxxxxxx ** Unless otherwise stated, all messages posted to the group are assumed public and may be printed in the club magazine ** Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/doc-uk/ <*> To unsubscribe from this group, send an email to: doc-uk-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/