The primary beneficiary of the proposed Keystone XL pipeline is a company that wants to refine tar sands oil into diesel and ship it to Europe while avoiding taxes, according to a new report by Oil Change International . TransCanada’s Keystone XL pipeline would move diluted bitumen — oil from the tar sands region of Northern Alberta, Canada — across the U.S. to refineries in the Houston area at the rate of 700,000 barrels per day