We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember
saying something like:

WD40 has been used for years as penetrating AND lubricating
Snake oil.


It doesn't do what it says on the tin for very long.
Oversold ****, in other words.
You can get exactly the same pentrant and lubricant action by making up
a spray bottle of a gob of engine oil with diesel.
The ONLY thing WD40 does well is act as a moisture dispersant,
temporarily.