Just normal degreaser and some rubby dubby in the tubby?
As chiroshi says Isopropyl Alcohol will shift mineral oil nicely. Or petrol, if you want to go smelly and old skool.
Isopropyl Alcohol ... petrol Lighter oil
If the lighter oil is in a lighter then you probably only need one of the other two ingredients and...
Lighter fluid works well
Having set fire to my garage not that long ago in an unfortunate welding incident, I'm reluctant to recommend the cleansing qualities of fire. Particularly if powder fire extinguishers are involved.
@M_V started
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As chiroshi says Isopropyl Alcohol will shift mineral oil nicely. Or petrol, if you want to go smelly and old skool.