On Tue, 05 Jul 2011 10:01 -0700, jim wrote:
> Over the years, the Freon degrades
> the rubber in the hoses, and can become
>  porous.  When that happens, there is enough room in the rubber
> structure for freon molecules to get through=20
>  the fabric of the hose.  Over a relatively long period of time, the
> freon can all leak out.

Hi Jim,

Thanks for the info. It sounds like if it leaks through porous hoses,
the system would have leaked refrigerant only and probably have retained
almost all of the oil. So no oil would need to be added, just
refrigerant. Interesting.

Best regards,

Bob

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