score:4
Looking at the Wikipedia page...
So the technological advancements seem to relate to (1) making something generally useful from oil, and (2) being able to extract oil in a large enough scale to create a large market for it.
One could imagine that people living near tar pits realized that oil would burn. But unrefined petroleum won't burn cleanlyβas cleanly as whale oil, for instance. So until petroleum could be distilled, it wasn't a very good product for lighting.