Excavation work at a Keystone Pipeline oil spill has been delayed because crews must clean up sludge around the site, ...

This motor oil is designed to offer superior protection against engine sludge (as measured in the Sequence VG Sludge Test), along with advanced protection against viscosity and thermal breakdown.

Sunday marks 15 years since the Deepwater Horizon Disaster in the Gulf of Mexico – remaining the worst oil spill in U.S.

The waterways and mangroves are blanketed in thick brown oil sludge that goes on for miles. Toxicity overpowers the air and a sense of lifelessness pervades the landscape. Many say it will take 10 ...