Houston Chronicle
Shell Oil Company's Jim Macias holds engine valves on fire to demonstrate how much fuel a dirty valve can absorb during a tour of the Shell Research Center Tuesday, June 25, 2013, in Houston.
(Photo by James Nielsen/Houston Chronicle via Getty Images)

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Editorial #:
1257199747
Collection:
Hearst Newspapers
Date created:
June 25, 2013
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Source:
Hearst Newspapers
Object name:
ShellTour0626
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