Oil posted a third weekly loss as the European Union suspended talks over a Russian oil price cap amid disagreements between member states. West Texas Intermediate futures fell 2.1% to settle at $76.28 a barrel after trading in a more than $3 range on Friday. European diplomats remain locked in talks over how strict the cap should be, having previously proposed a range of $65-$70. Poland and the Baltics felt the cap was too generous to Russia and now diplomats have postponed discussions until ....