For signal coupling caps, I find the silver-gold oil to be harmonically more complete than the silver oil. They are both a little bright, compared to a copper wire, and some other caps, but sound superior to almost all audiophile signal caps.
I would try the V-cap bypass on a larger oil filled, but not on another dry type film cap.
I would try the V-cap bypass on a larger oil filled, but not on another dry type film cap.