Convert it back to R-12. Make sure the system is properly flushed, and all of the old oil is removed. I would also consider replacing the Dryer, and Orifice, and replace all of the seals. IMHO, there is no reason to convert your DeLorean to anything. R-12 works fine, and the small additional cost for R-12 when you need a pound every 3 years or so will not make a difference. > Hal Palmer wrote: > > it. Was advised it would cost about $300 to convert it back. Anyone > have any thought's or advice?? Thanks