TOM WALKER wrote to ROY WITT:   
      
    RW>> Roger Nelson wrote to Roy Witt:   
      
    RW> RN>> We finally found the valve to input some more freon this   
    RW> RN>> afternoon and all it needed was a can.  Everything working well,   
    RW> RN>> now.   
      
    RW>> How many pounds of pressure is that one can good for? One can brings   
    RW>> my Z28 up to just over the minimum.   
      
    TW> Did you read where they were mandating another Chjenge to the   
    TW> Refigerant used in Automobiles. Some one decided that the R-134a was   
    TW> also polluting too much and have come up with a revised formulation,   
    TW> HFO1234yf.   
      
   Yes, that was mentioned in one of the emails that I get from GM. Maybe a   
   year or so ago.   
      
    TW> GM plans to start using it in soem of their 2013 Models.   
      
   They should also mention that R134 is incompatible with 1234 as R12 is   
   incompatible with 134...This of course means that there will be yet   
   another form of recharging nipples.   
      
    TW> They thought about using CO2 for a while but it requires verty high   
    TW> head pressures so it was not selected. IT does make a nice refigerant   
    TW> though.   
      
   Isn't that the stuff that the environmentalists are freaking about causing   
   global warming? Guess they never thought about looking at the source.   
      
    TW> teh Refigerant is expensive, about $3000 for a 20 LB tank and it   
    TW> requires a totaly NEW recharge and recovery unit for the shop at   
    TW> $2000 to $3000   
      
   They'll do anything to make it impossible for the independent garage to   
   service AC...   
      
      
            R\%/itt   
      
      
   --- GoldED+/W32 1.1.5-31012   
    * Origin: Texas Lone-Star - Texan, American, USAian  (1:387/22)