By Reuters Staff 3 Min Read (Reuters) - U.S. cash crude differentials mostly weakened on Monday as the spread between benchmark U.S. crude futures and Brent contracted, dealers said. FILE PHOTO: Pump jacks operate at sunset in Midland, Texas, U.S. February 11, 2019. REUTERS/Nick Oxford/File Photo Coastal grades including Louisiana light Sweet (LLS) and Mars eased as the Brent/WTI spread narrowed by 7 cents a barrel. A narrow spread typically makes U.S.-crude linked coastal grades less attractive to international buyers compared to Brent-linked grades. Among inland grades, WTI Midland eased by 5 cents on signs of increased production from the Permian basin.