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Robert Bosch GmbH said its engineers have developed a new diesel-exhaust system that cuts emissions far below legal limits taking effect in 2020 and can help automakers avoid potential driving bans in Europe that threaten to doom the engine technology.

As national average gasoline pump prices climb to near $3 a gallon for the first time since late 2014, the President Donald Trump made it known that he won’t stand for OPEC’s cartel tricks. Bad news, Mr. President: Diesel prices are there.

The U.S. average retail price of diesel rose 0.1 cent to $3.043 as oil remained near $63 a barrel amid ongoing uncertainty over a U.S. trade war with China.

The U.S. average retail price of diesel rose 3.8 cents to $3.010 as the potential for conflict in the Middle East rose, lifting the price of crude above $65. It was the first increase in the average price of diesel after six consecutive declines that saw the price per gallon drop by 11.4 cents since Feb. 5.

The U.S. average retail price of diesel fell 0.4 cent to $2.972 as energy production in the U.S. remained strong and the price of crude oil stalled near $62 a barrel.

The U.S. retail diesel average declined 3.6 cents to $3.027 a gallon, the Department of Energy reported Feb. 20.

The U.S. average retail price of diesel fell 2.3 cents to $3.063 a gallon while oil dipped below $60 a barrel in the face of market concerns over increasing domestic production.

When freezing weather strikes, cold-weather pros know to treat diesel with additives to prevent the fuel from gumming up their engines.

Several truckload carriers are currently negotiating with shippers to add new surcharges or otherwise raise rates to haul freight through California after state lawmakers raised fuel taxes and other fees as of Nov. 1, Transport Topics has learned.

Video: Cummins' Tim Proctor, left, talks with TT's Roger Gilroy about meeting the fuel economy needs of customers who are concerned about global warming.