Duron Advanced 5W-30 earns OEM approval for the latest Volvo and Mack engines, giving fleets a new low-viscosity option for fuel savings and protection.

The Wyoming refinery arm of Salt Lake City-based Sinclair Oil has agreed to pay a $1.6 million penalty and to install additional pollution controls to resolve allegations that it violated emissions ...

TULSA, Okla. -- Sinclair Oil Corp., refiner and operator of more than 2,600 Sinclair convenience stores, will spend $1 billion to expand its refinery here, in efforts to increase daily output of ...

WASHINGTON, DC, Dec. 19-- Sinclair Tulsa Refining Co. and two of its managers pleaded guilty to felony pollution charges of violating the federal Clean Water Act (CWA), the US Environmental Protection ...