RW>Roger Nelson wrote to Roy Witt:

RW> RN> We finally found the valve to input some more freon this afternoon
RW> RN> and all it needed was a can.  Everything working well, now.

RW>How many pounds of pressure is that one can good for? One can brings my
RW>Z28 up to just over the minimum.

Did you read where they were mandating another Chjenge to the Refigerant
used in Automobiles. Some one decided that the R-134a was also polluting
too much and have come up with a revised formulation, HFO1234yf. GM
plans to start using it in soem of their 2013 Models. They thought about
using CO2 for a while but it requires verty high head pressures so it
was not selected. IT does make a nice refigerant though.

teh Refigerant is expensive, about $3000 for a 20 LB tank and it
requires a totaly NEW recharge and recovery unit for the shop at $2000
to $3000

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