

I didn’t say no uses, the Natives near where I live liked to seal canoes that way, but without further processing crude oil isn’t a particularly great fuel, for example.
What were the Arabs doing with it? At least in the European empires, lamps weren’t a big use until after the whale oil era.
















You’re looking at the Wikipedia too, I guess? It says “fuel”, I assume that means a disgusting smoky burn barrel situation. I’d place it in the same category as peat, where maybe there were cultures that ended up exploiting it for heating and cooking, but anyone with a choice didn’t. You’re definitely not using crude in a nice little oil lantern; that’s why we invented refining in the first place.
To answer my own question, Greek fire and asphalt for paving. Maybe the cost of using a medieval-style alembic or an inability to generate more than two fractions prevented more advanced uses. It sounds like they were close, though. You could write a cool alt-history about that.