I too squirrelled away some R12, a 35 pound can, but it's almost gone. I have reluctantly resorted to converting to save the R12 for my 300E that I don't want to convert when the time comes.
Thanks VERY MUCH for sharing your experience with us. I think that 1,000 conversions is sufficient data to consider this as valid information.
I am forced to convert my daughter's 300D to r134. It has an R4 compressor and I'm glad your experience with ester in these has proved to be somewhat successful.
My curiosity is peaked though, I was told a long time ago not to use PAG in a retrofit. Is this only acceptable if the system is COMPLETELY flushed and new filter drier used?
Thanks again for the info.
Have a great day,