oleaginous

...The phrase personality interviewer is grossly devalued these days: look at Mike Wallace’s cringe-making oleaginous encounter with today’s Iranian must-get, President Ahmadinejad. Indeed, Wallace seems to have found Ahmadinejad even more attractive (“very smart, savvy, self-assured, good-looking in a strange way”) than Fallaci found Khomeini. She was “the greatest political interviewer of modern times” (Rolling Stone), and yet, unlike so many of the bland big shots jetting from foreign ministry to presidential palace, she gravitated to power mainly for the opportunities it afforded to knee it in the crotch...

- Mark Steyn, in The Atlantic's December Post Mortem tribute to Oriana Fallaci, She Said What She Thought.

Definitions of oleaginous on the Web:

buttery: unpleasantly and excessively suave or ingratiating in manner or speech; "buttery praise"; "gave him a fulsome introduction"; "an oily sycophantic press agent"; "oleaginous hypocrisy"; "smarmy self-importance"; "the unctuous Uriah Heep"; "soapy compliments"

greasy: containing an unusual amount of grease or oil; "greasy hamburgers"; "oily fried potatoes"; "oleaginous seeds"
wordnet.princeton.edu/perl/webwn

- definitions from the Google search define: oleaginous.