US Gulf Coast cash crude differentials against cash WTI weakened sharply Wednesday,pres sured by a narrowing in the WTI/Brent spread,market sources said.July delivery Light Louisiana Sweet crude was reported done at a 6/barrel premium to cash WTI Wednesday,from Tuesday's 6.75-6.80/b premium.July-delivery Heavy Louisiana Sweet was reported done at a 4.10/b premi um,from Tuesday's 5.20-5.25 premium.
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