Ahh, so it sounds like you would be basically getting a mostly PG throat hit and a bit of the tobacco with it. I had heard that before, but IIRC it doesn't change to the oxide in ecigs does it? Otherwise that would be a serious problem for the entire vaping community. --------------------------------- I tried vaping pipe tobacco at 480F and 490F on my Arizer E Q to test the 477F boiling point idea. To be honest it didn't feel any different as far as the nicotine delivered than when I vape at 446F and 428F and 410F (the arizers preset temps). It was slightly more harsh and at 490F the tobacco eventually started to combust. So I am not sure what that means, you are correct on the nicotine boiling point, but possibly the point that it vaporizes out is much lower. When I do vape at the "suggested temperature" for tobacco (350F I believe) I get almost nothing. No feeling nor barely any vapor, so I think the higher temperatures are needed. Around 410-440 seems to be the sweet spot on my E Q.