[Prune]

Patrick Turner wrote in
:
teflon, then they move to oilers

I don't get the oil thing at all, seems inconsistent to me -- oil has a
high dielectric constant, just the opposite of what the reasoning for using
Teflon seems to be (and of course the dielectric constant of polypropylene
is even lower than Teflon).

The only thing that makes sense is that foil would be better than film, for
the same reason Vishay makes metal foil resistors along their metal film
line (they have a white paper explaining why it matters, to what extent
it's just marketing I can't judge).