Colorado's latest federal oil and gas lease sales have been a mixed bag according to environmental groups and trade officials.

The Division of Oil and Public Safety started receiving complaints Thursday after diesel was loaded from a Sinclair terminal ...

The Trump administration wants to expand drilling on public lands, but oil and gas developers expressed zero interest in ...

Contaminated gas was sent to "numerous" Colorado gas stations, spurring an investigation into gas sold at Costco, King ...

Dozens of gas stations across Colorado’s Front Range sold a contaminated fuel mix to customers last week after a HF Sinclair ...

"Indefinitely going forward, we will sell the production that comes out of Venezuela into the marketplace," U.S. Energy Secretary Chris Wright said.

State officials say the number of people who have filed complaints that they bought contaminated gas in the Denver metro area ...

Wyoming holds three times more oil and gas drilling permits than Colorado but drills far fewer wells. The numbers show that ...

Steve On Your Side has mapped almost three dozen gas stations that may have received unleaded fuel contaminated with diesel ...