Didn't expect to be dropping ancient Chinese philosophy here, but I couldn't help but think of this story:
A lord of ancient China once asked his physician, a member of a family of healers, which of them was the most skilled in the art.
The physician, whose reputation was such that his name became synonymous with medical science in China, replied, “My eldest brother sees the spirit of sickness and removes it before it takes shape, so his name does not get out of the house.
“My elder brother cures sickness when it is still extremely minute, so his name does not get out of the neighborhood.
“As for me, I puncture veins, prescribe potions, and massage skin, so from time to time my name gets out and is heard among the lords.”
Wouldn't it be worthwhile to clean up the oil and gold in the one operation? And still profit?
It says inthe article that the gold has already been recovered... There is only the expensive part left.
Oh I missed that... "Two salvage attempts, in 1941 and 1953, recovered all but five gold bars.". Pity that the oil is probably considered diluted/unfit but I recall that ships like this have thick oil like a gel. Not crude oil or engine oil that you might think of first. Maybe it could be refined, If it was recovered???