At least 20 oil tankers queuing off Turkey to cross from Russia's Black Sea ports to the Mediterranean face more delays as operators race to adhere to new Turkish insurance rules added ahead of a G7 price cap on Russian oil, industry sources said. #ukrainerussiawar #g7 #oilprice #energy #turkey #blacksea #russianoil #russia #News #Reuters #newsfeed Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en