There are now several "drop in" replacements for R-12. Check with either a large A/C wholesaler or a shop that specializes in A/C work. They will be familiar with what is working well. Try not to convert to R-134. The system was not desiegned for the operating pressures that R-134 requires so it will loose approx 20% of cooling capacity. Also it is incompatable with the lubricant used for R-12 so unless the system is COMPLETLY dissasembled and cleaned of all of the old oils it will cause trouble in the future. The origional "O" rings must all be replaced or they will leak because they are not compatable with the lubricants for R-134. The bottom line is R-134 although cheaper isn't worth the trouble. The easiest answer is to fix all of the leaks and refill with R-12. Although expensive it is still obtainable. The next best alternative is one of the new "drop in" replacements. --- In dmcnews@xxxx, "dmcman82" <dmcman73@xxxx> wrote: > 1. Check the price on R20 (or is it 22?), it's the freon used in > home A/C's, I believe it is cheaper than R134a...if so use this to > > [Non-text portions of this message have been removed]