Saw a Starbucks poster recently promoting their new thing: coffee with olive oil. Never tried it, but got me wondering about this thread.

If it also has sugar, does that mean it will be both sticky and oily at the same time? So, for your brakes, no harm done? Or complete disaster? Maybe it will just give your new rotors a nice brown, "oil slick" (all the rage now, it seems) look. Trend setter!