Oil faces big monthly loss as oversupply bites

By Libby George LONDON (Reuters) - Oil prices fell to their lowest levels since April on Friday, with on Brent track for its biggest monthly loss since December 2015, pressured by slowing economic growth that threatened to increase a supply overhang of crude and refined products. Brent crude oil futures were trading at $41.89 by 1008 London time, down 81 cents, their lowest since April. U.S. West Texas Intermediate (WTI) crude fell 54 cents to $40.60 a barrel, slipping below $41 for the first ti