Southern Green Canyon crude slipped to its biggest discount against West Texas Intermediate in more than two years.
The Gulf Coast-produced crude weakened 35 cents to $1.10 a barrel under WTI at 2:16 p.m. New York time, the biggest discount since Dec. 29, 2010, according to data compiled by Bloomberg.
Light Louisiana Sweet dropped 10 cents to a premium of $5.75 a barrel. Heavy Louisiana Sweet fell 5 cents to a premium of $5.30 over WTI.
Mars Blend dropped 15 cents to a 5-cent-a-barrel premium over WTI, while Poseidon rose 60 cents to a discount of 70 cents. The premium for Thunder Horse, which has a lower sulfur content than Mars and Poseidon, gained 15 cents to $3.40 a barrel.