FWIW, No fish oil. I have it on good authority (hee hee) that the Primary ingredient is mineral oil, not diesel or JetA, lesser components are proprietary (the part that 'disperses') and the last is just fragrance. Lots of 'counterfeit' and illegal "real" shipments out of the far east.
My wife works at WD and I get all mine for free. I use it for everything in the machine shop because....its free. Its okay as a coolant on the lathe or mill, but there are better things that dont stink up the shop.
I did speak with a maintenance rep from Textron, er Beech, er...whoever makes Citations now; that WD is NOT ALLOWED in the shop area. Why? "because of its 'flammability'."
While it may be combustible, it does NOT support a flame on its own. Next time you're burning leaves/trash spray some on the fire. It will burn, but immediately goes out.
Sorry, I've been gone so long. Solved my tax issues in CA