FWIW, I believe petroleum is a synonym for crude oil. If you put it in your cars fuel tank, you'll have a bad time. Gasoline is made from petrolium.

I'm pretty sure petrol means gasoline not petroleum.

Petrol is technically just short for petroleum, which is latin for "rock oil"

Gasoline is from gas + plus the chemical suffix "ol" short for the latin "oleum", and "ine" meaning "made of".

	▲	delecti an hour ago \| parent [-]
		But the etymology of a word doesn't prove that someone is using that word wrong, or people on both sides of the pond would have to start baking our biscuits a second time.

dylan604 3 hours ago | parent | prev [-]

petrol !== petroleum

the confusion is solely in your reading comprehension skills and not in the GP's use of the words