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Noble Corp., the world’s biggest offshore oil rig contractor by market value, agreed to buy its smaller rival Diamond Offshore Drilling Inc. in a deal valued at $1.6 billion.

Drilling in the U.S. shale patch dropped to the lowest level in almost 2½ years as operators vow to make good on promises to investors for subdued production growth this year.

WASHINGTON — New vehicles sold in the U.S. will have to average about 38 miles per gallon of gasoline in 2031 in real-world driving, up from about 29 mpg this year, under new federal rules.

FRANKFORT, Ky. — EVs have built up enough momentum from job growth and investments to steer past any roadblocks from Donald Trump and other critics, Kentucky Gov. Andy Beshear said.

A change to Mobil Delvac™ Extreme FE 10W-30 FA-4 diesel engine oil made the team’s car haulers more efficient, needing only one oil change during race season and saving nearly 900 gallons of diesel fuel. 

GENEVA — U.N. Secretary-General António Guterres called June 5 for a “windfall” tax on profits of fossil fuel companies to help pay for the fight against global warming.

Alabama is leading a 19-state coalition suing California and four other states in the U.S. Supreme Court over state legal fights against energy companies.

Industrial gas giant Air Products plans to build a network of commercial-scale, multimodal hydrogen refueling stations stretching from Northern California to Southern California.

Kel Kearns is slated to be the CEO at the commercial vehicle battery cell manufacturing joint venture set up by Accelera by Cummins, Daimler Trucks & Buses U.S. Holding and Paccar Inc.

Sen. John Barrasso is asking a government watchdog to investigate nearly $1.7 billion in financing offered last month to hydrogen company Plug Power Inc.