IMO 2020 regulations challenge Russian Urals crude

MOSCOW (Reuters) - Urals differentials have fallen to the widest discounts against dated Brent crude in a year as refiners start switching to low-sulphur grades in the face of coming IMO 2020 regulations.The International Maritime Organization (IMO) will from January require shippers to reduce the sulphur content of fuels used in their vessels. To produce low-sulphur maritime fuel, refiners have to switch to sweet grades.Urals crude oil has a sulphur content of about 1.6-1.8%, while the IMO 2020..