oil industry
refining industry
oil business

The same data we had was available to many other companies in the oil industry.

The city is also known as the center of an oil industry.

The foreign companies continued to play a key role in the oil industry.

He has experience in the oil industry, teaching and writing.

But all that would change if the oil industry moved in.

Joe has nearly 25 years' experience in the oil industry.

The American oil industry hasn't died; it has simply moved away.

There used to be an oil industry in the region.

"The oil industry has access to everyone on the committee."

The American oil industry would like to produce more at home.