* Light Louisiana Sweet for March delivery was unchanged at a midpoint of a $3.50 a barrel premium to U.S. crude futures
* Mars Sour was seen bid and offered between a $1.20 and $1.10 a barrel discount to U.S. crude futures
* WTI Midland gained 10 cents at a midpoint of a $2.30 premium and was seen bid and offered between a $2.20 and $2.40 a barrel premium to U.S. crude futures
* West Texas Sour fell $1.05 at a midpoint of a 10-cent discount and was seen bid and offered between a discount of 30 cents?? and 20-cent a barrel discount to U.S. crude futures
* WTI at East Houston , also known as MEH, traded between a $2.35 and $2.55 a barrel premium to U.S. crude futures
* ICE Brent April futures rose $1.61 to settle at $82.21 a barrel on Thursday?.
* WTI April crude futures rose $1.44 to settle at $75.39 a barrel on Thursday?.
* The Brent/WTI spread widened 17 cents to minus $6.82, after hitting a high of minus $6.50 and a low of minus $6.86. (Reporting by Tim McLaughlin; Editing by David Gregorio)