diluted bitumen

The Dilbit Factor in Exxon's Pipeline Spill

Experts say the heavier, high-sulfur oil from Canada could have created bigger pressure swings and promoted crack growth in the old, flawed pipe.

By Elizabeth Douglass

Arkansas Oil Spill Shatters American Dream of Some

By Maria Gallucci

Exxon Damage Assessment: If Not the Feds, Then Who?

By Maria Gallucci

Exxon Spill Probe Falls to Understaffed Agency

By Katherine Bagley

Dilbit or Not? Wabasca's the Question

By Maria Gallucci

In Bid for KXL, Alberta Premier Pleads Poverty

By John H. Cushman Jr.

Under Pressure: Exxon Pipeline Rips a 22-Foot Gash

By Lisa Song

Has Heavy Oil Pipeline Corrosion Met Its Match?

By Maria Gallucci

Agencies Asked to Delay KXL Over Pipeline Safety

By Lisa Song

Dilbit Sinks in Enbridge Spill, but Floats in Its Study

Lisa Song