Re: [MBZ] DIY AC repair in modern times

[Peter Frederick]

The green ones are a different material, just what I don't know.  The 
older black 0-rings don't last well in PAG or PEG compressor oil, 
although they will last nearly forever in mineral oil.  All McParts 
stores have them, and I'm sure Rusty does.  He will have the correct 
ones, makes it easier to get the correct ones in place -- the "kits" at 
McParts have dozens of sizes, and never enough of just the one you need 
-- there are at least six different ones I've found so far!

Peter