North Sea Crude-Grades fall on lack of demand

LONDON, March 26 (Reuters) - North Sea Troll, Ekofisk and Oseberg crude differentials fell further on Thursday after sellers lowered their price expectations amid a lack of demand. PLATTS WINDOW * No deals. * Oseberg: Vitol offered an April 13-15 cargo at dated Brent minus 95 cents, weaker than an offer on Wednesday. * Troll: Glencore offered an April 13-15 cargo at dated Brent parity, also weaker than Wednesday. * Ekofisk: Total offered a cargo loading on April 20-24 at dated Brent minus 20 cents. (Reporting by Alex Lawler; editing by Pritha Sarkar)