Over time, tiny contaminants invade the oil, like combustion byproducts, miniscule metal fragments from the engine, and a sludge created by the continuous cycle of heating up and cooling down.

"In the 1970s we got our first taste of what it was like ... oil and ethanol? Actually, the combination of those would seem to fit nicely into today's engine structures," he says. Fuels aren't the ...

U.S. oil production will peak between 2027 and 2030, Occidental Petroleum Corp CEO Vicki Hollub said on Tuesday at the ...