My bet is that largest bones here are just too big and find some recipient where to cook them was impossible. But both whale fat and petrol oil are possible he

My bet is that largest bones here are just too big and find some recipient where to cook them was impossible. But both whale fat and petrol oil are possible here. Maybe the whale died by a black tide and was floating some time before to be scooped by the ship. Fin whales type are fast cetaceans and crashing with a ship is not so usual like in other cetaceans. Not unless is an ill animal.