Greetings MMD,  Marvel 'Mystery Oil' has been around forever and has
many uses.  Synthetic oils made now are probably superior but Marvel
smells better.  I would guess that the formula for Marvel has changed
over the years.  It would not surprise me if it was made with sperm oil
at one point; now it may be synthetic.  Any historical information on
this?

I remember hearing that, for a time, automatic transmission fluid
manufacture was the major consumer of sperm oil.  Any truth to this?

Best regards,
Spencer Chase
Laytonville, Calif.
http://www.spencerserolls.com/