I talked to last owner-he seems willing to discuss some sort of compensation.
What a clusterf*ck.
At any rate, he said some 'o ring' right near where coolant is added has dried out and is leaking. They supposedly converted it to the new stuff.
I'll probably have it taken to an AC shop and have the dye pumped in to see where it's leaking from...

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1982 Silver 300DT