Jockey, what you and Jeff basically say the same thing. He's pulling from the exhaust and you're suggesting the way I'd set it up on TIC's TA car (I did a lot of guinea pig work on it). I also had 'cold' flow on the last can to help vapor condense.
It was amazing how much crap ethanol we were pulling out of the oil. Stuff that'll poison a catalytic converter...for any of you running one.