polymorph:
WD40 is not oil. Too many people treat it like it is.
That's not what the Wikipedia link says.
"WD-40 is primarily composed of various hydrocarbons."
"The long-term active ingredient is a non-volatile, viscous oil which remains on the surface, providing lubrication and protection from moisture."
They state the MSDS sheet says "<25% petroleum base oil, presumably a mineral oil or light lubricating oil."
You have other information?