I think that 'per capita' is actually a fairly good way to describe oil consumption.

If one looks who ranks before the USA in that measure one sees that nearly all of these countries are tiny island countries or oil producers.

I don't know how the per capita oil consumption is determined, but if transport (of people and goods) to and from the country is in the calculation I am not surprised that small island countries have a very high per capita consumption. And that those who sit on the oil and for whom oil is extremely cheap have no incentive to use anything else to produce energy I also find unsurprising.

If one looks at larger industialised countries without (much of) own oil, those that are comparable to the USA, one finds that roughly the per capita consumption in the USA is twice as much.

Wolfgang