US Gulf cash Mars/Poseidon crude spread weakened Friday to minus 10 cents/barrel,after trading at mostly parity the past few months,on a tightening in Poseidon supply because of a new Poseidon-Bonito crude pipeline link,market sources said.The effects of this link appears to have finally kicked in," said a source.Shell and the Poseidon Oil Pipeline on April 1 completed as planned a 0.4-mile pipeline connection between the Auger pipeline and the Poseidon pipeline in the US Gulf of Mexico.
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