Thanks for the feedback. There is no refrigerant of any sort in my system. I'll think some more about the air. I know it will introduce a good amount of moisture no matter how well my compressor dryer works. I may just take my chances on charging it up with ES 12 (I know this is controversial to some, no need to get into it on this thread for my sake). The problem with ES 12 and other blends, of course, is that the gases leak at different rates and mess up the blend ratio, so if you have a leak you have to evacuate and start all over. Not a huge hassle except that you're then guessing about how much oil to reintroduce.

-Jeb

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1985 300TD "Ted", 220,000 miles