Taxiing jet engines groaned on the tarmac, their fumes filling the Port of Seattle's firetruck bays on an early summer day here. Snaking hoses connected tanks and filters in a complex cleanup ...

•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.

Motor oil has quietly become one of the most important choices car owners make, especially as vehicles routinely cross 150,000 kilometers and keep going. The debate between full synthetic and high ...

Bruce Bruso, president and CEO of CBA Environmental, explains how sewage sludge is converted into alternative energy at his plant in Hegins. He says sludge can reduce pollutants. PETE G. WILCOX/THE ...