While there seem to be any number of these papers available this one is rather interesting. It argues for a temp around 190˚F rather than the 212˚F temp I tend to favor for vaporizing moisture in the
oil. Decent read, not sure what the real answer is, but worth a look.
Turns out the pdf is too big for the site so here is the link to a downloadable pdf =>
Optimum Oil Temp
Ed