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Four automakers backing a California effort to curb tailpipe emissions will break with some big rivals in the legal battle over the Trump administration’s relaxation of fuel efficiency standards.

The U.S. Justice Department denied politics played a role in its decision last year to open an antitrust investigation of four automakers that reached an agreement with California on fuel-efficiency standards.

Attorneys for the nation’s largest glider truck manufacturer have asked a federal judge for permission to seek a partial summary judgment to block an attempt by the IRS from collecting $83 million in back taxes and penalties.

The lowest level of North American Class 8 truck orders in modern times is not stopping fleets and engine manufacturers from pushing ahead to prepare for more stringent emission regulations. Companies are finding ways to squeeze out better fuel mileage and uptime performance from the next wave of diesel engines.

Volkswagen AG’s use of technology that helped it to cheat on diesel engine pollution tests violated European Union rules, an EU legal adviser warned in the second setback for the automaker at the bloc’s highest court this month.

The trucking industry needs to continue adopting electric technologies such as fuel cells in order to combat pollution, experts said April 14.

A court in the United Kingdom ruled that Volkswagen AG used a so-called defeat device to help its diesel vehicles beat emissions tests, a decision that allows 91,000 customers to proceed with a class action against the carmaker.

The Trump administration will dramatically relax automobile emissions and fuel economy standards so that only modest efficiency gains are required through 2026, according to people familiar with the matter.

NEW YORK — ExxonMobil on March 3 outlined how it is reducing the methane its operations release into the atmosphere, detailing its efforts as governments around the globe write new rules to regulate the harmful greenhouse gas.

With little promotional fanfare so far, privately held AdTra intends to offer fleets its platform of fueling technology and fuel.