WASHINGTON, Jan 11 (Reuters) - The discount for Russian crude oil in global markets has increased about 40% since the U.S. started increasing enforcement of the G7's price cap on the oil in October, a U.S. Treasury official told reporters on Thursday.

The discount for Russian Urals to the Brent international benchmark has gone from about $13 a barrel in October to about $18.50 a barrel now, the official said on condition of anonymity. The figure is a "meaningful link to the fact that the market is being more receptive to our enforcement and compliance actions around the price cap," which the G7 imposed on seaborne Russian oil for Moscow's invasion of Ukraine, the official said.

(Reporting by Timothy Gardner)