Phipi's "watch conundrum" thread reminded me of an old personal mystery. tonyp12 mentioned dielectric grease around the battery terminals as a potential problem...
I was a grease monkey (Ford dealership mechanic) in the summer of 1980, when I bought my trusty(?) Corvair. Then-modern cars had electronic ignitions with distributor caps & rotors. Any time we did tune-ups or ignition system repair, we followed dealership SOP and sprayed a bunch of ordinary aerosol lithium grease inside the distributor cap. Indiscriminately, everywhere. I asked everyone there why (izzit supposed to conduct or insulate or seal?) and never got the same answer twice. I never did this on my own car with old-school points & condenser, quite the opposite, I kept it real clean.
My best guess is that on the electronic ignition cars, the HV spark mostly burns/vaporizes the grease away, and whatever bit is left runs down to make a pseudo-seal around the distributor cap to keep dirt & water out.
The debate rages on at https://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=552408
Anybody have more insight?
"When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."
- Pablo Picasso