WD-40 is the 0W20 in the BITOG discussion board--- too many people just diss'ed with it, saying something like: too thin, lack of viscosity, runs like water, boils like water, wouldn't last a 10 mile Timmy Horton's trip in my car, etc.
Whether you like it or not, that's only a matter of preference. While I do agree though that it works well as a light lube to soften pricing stickers and such, it serves no use in my house (and I have 2 spray cans of it lying around). I tend to use some heavy stuff like lithium grease spray for door hinges, etc. or aero kroil/silikroil for rusty bolt/nut extraction. WD40 simply doesn't cut the mustard in this case.
Well, so much for WD40
My 2c's worth.
Q.