Yes, Puretane donated a couple cases to Skunk Pharm Research for testing and I pre-distilled it, to find it still has some MO.
After removing the MO, we extracted a Mk III run with it and got good results. I would use it, but I always pre-distill, regardless of whose gas.
Here is how Skyhighler's tests rated it in the pack, as far as how much MO:
http://www.tokecity.com/forums/showthread.php?51333-Lube-inside-canned-butane-Mystery-Oil&p=1338141&viewfull=1#post1338141
A new player on the block in Oregon, named Apis Labs, whom is supplying Praxair 99.5% Instrument grade n-butane and n-Propane, which deposited minimal MO distilling 48# from two LP-5's bringing a new Mk VB on line, so I sent a tank to my third party state certified forensic lab for analysis. I will report back when I see those results, but the n-Butane goes for $300/LP-5. Until their web site is up,
[email protected] is how I contact Jay.