Steel will burn too if it gets hot enough. That crap about fire wont melt steel is truthers bullspit about 9-11. Take piles of jet fuel, dump it into a tower like the WTC, add oxygen, as the tower would do, acting like a huge chimney, and there is no end to how hot the fire could get. Steel could burn up completely.
Right, with enough oxygen at the outset, oil will burn hot as sin. From a constant flow, it would be relentless too.