Coming from a EE background, sounds like total bogosity relying on the customers not knowing anything about electronics. Magically dripping oil on a piece of electronics makes it use half the power, yeah get back to me on that.

I never knew that adding massive capacitance to high speed signalling lines made their drivers draw less current (super sarcastic here, its the other way around)

I've dunked my share of power resistors, precision resistors, and the occasional semiconductor in oils of various sorts and nothing too exciting happens. Some electrolytic caps are not very well sealed and leak oil in and (conductive) electrolyte out. Some component marking inks are oil soluble and some inks are semi-conductive, which can be a problem.