You can, of course, buy oil producers.

当然喽，你可以购买石油生产股。

youdao

Is it wise to buy oil and gold companies' stocks?

现在买石油或者黄金公司的股票是否明智呢？

youdao

China and India may buy oil to make up for the export shortfall.

中印可以购买叙的石油，以弥补其出口缺口。

youdao

Tehran is a major oil-producing country, but has just one domestic refinery, forcing it to buy much of its gasoline from abroad.

VOA: standard.2009.12.18

The U.S. has pressured countries that buy oil from Iran to reduce purchases or face sanctions.

WSJ: India Plans to Cut Iran Oil Imports

Since then, Jersey Electricity has had to buy oil to generate electricity at La Collette Power Station.

BBC: Jersey review finds electricity prices 'are fair'

If they followed the advice to hedge, the residents of Flint, Mich. would, en masse, buy oil futures.

FORBES: Taking the Plunge