A few months ago I posted a comment under a Frank Bruni post on truffle oil. In effect I wrote that any I have had stinks like rotten socks or spoilt garlic because rather than being a simple infusion of truffles in oil it doctored with some skanky chemical (2. 4 dithiapentane) whose name I could not recall at the time. I concluded, in nigh-perfect academese, that truffle oil and was a waste of money and best suited for lubricating the condoms of randy swineherds and not fit for human consumption. Most of the other comments sounded like they were written by a bunch of pot smoking massage therapists and included advice like "if you use it correctly it is great" and similar drivel.
So you can imagine my glee when I found this NT Times article by Chef Daniel Patterson who explains that "many" (I'd say almost all) truffle oils are doctored with a synthetic aromatic compound.
Hocus-Pocus, and a Beaker of Truffles - New York Times
Thanks chef! You made my day. Now to be fair, there probably are true truffle oils out there -just don't expect to be able to find one unless you make it yourself.