I have an 82 300 SD- the airconditioning compressor was locked up,with no belt, I have replaced the compressor,reciever/dryer,-and put in ester oil in those componets- 2oz. in comp & 1 oz. in rd-I have not yet turned anything on, and i would like to know how i go about flushing the old mineral oil out of the rest of the system before I try to recharge the system. also I have gotten alot of conflicting advice as to whether or not R-134 will cool this car--- or should I stick with R-12 --( if I can get it) some mechs have given me advice that R-134 will not cool this system witout replacing all the components--- I find this hard to believe-- Does any one have some really usefull info? also DOES ANYONE HAVE SOME R-12 I could buy at a "resonable Price?" I have a compressor that I could flush solvent thru the system "components that have not been replaceced" I know better than to do that!--- HELP would be appreaciated.