By Ben Aris in Berlin Donald Trump’s grab of Venezuela’s oil is not just about making money. He is also grabbing an ultra ...

•Lubricating oil in its natural state is supposed to be clean and must be easy to flow to reach all the moving parts within the shortest time possible. •Once the oil starts to get dirty, the ability ...

Oil sludge treatment and recovery remain critical challenges in environmental remediation and resource recovery, due to the hazardous nature of sludge generated in petroleum refining and related ...

The sludge in the glass jar on David Nelson's bookshelf here is thicker than molasses and was once thought worthless. But the Chevron Corporation, whose operations he runs in eastern Venezuela, has ...

Consumers saddled with sludge-clogged Toyota engines may soon get some help from the Japanese auto giant under the terms of a class-action lawsuit settlement that covers roughly 3.5 million Toyota and ...