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The U.S. average retail price of diesel dropped 3.5 cents to $3.282 a gallon in data reported Nov. 19 as crude oil prices fell amid persistent concerns about oversupply.

DUBAI, United Arab Emirates — The perpetual drive toward improved fuel economy and tighter emission controls for diesel engines will push the trucking industry toward increasingly efficient, low-viscosity engine oils, technology experts at Shell Lubricants said.

BAGHDAD — Iraq began piping oil from its fields around the disputed city of Kirkuk on Nov. 16, more than a year after exports were halted over troubles with the autonomous Kurdish administration north of the country.

Tesla CEO Elon Musk says he will walk the entire Model 3 production line Nov. 27-28. From battery cells to finished vehicles, all assembly areas need to be able to support making 1,000 cars per day, he said.

FRANKFURT, Germany — Automaker Volkswagen says it will invest $50 billion (44 billion euros) in developing autonomous and electric cars and expand the appeal of battery-powered cars by selling its upcoming ID compact for about what a diesel-powered Golf costs.

Natural gas took a breather after its biggest gain in eight years as forecasts for lingering U.S. cold spurred concern supplies may not be enough to meet winter demand.

Composite pressure cylinder supplier Hexagon Composites ASA signed an agreement to acquire the remaining 50% of Agility Fuel Solutions Holdings Inc., which promotes the alternatives of natural gas, biogas, hydrogen, propane and electrification to power a range of industries.

The U.S. average retail price of diesel dropped 2.1 cents to $3.317 a gallon Nov. 13 as the price of West Texas Intermediate crude oil fell to an 11-month low.

Tire failures remain the No. 1 reason for roadside assistance calls. And most tire-related problems come from underinflation as a result of leaks, punctures or just poor maintenance programs.