The oils are only situationally useful.
This one would not suggest them for farming of base materials, but rather for limited runs to try to get the less common drop out of certain ores, or filling up on Starmetal if you use that.
On Siptah, due to the way resources are on the map and in chests/drops, this one would suggest against using oils in general.
They are much more utile in the Exiled Lands.