US Cash Crude-Mars firms as Chevron's license to operate in Venezuela set to expire next week

May 22 (Reuters) - Mars steadied on Thursday after touching four-month lows in the previous session, dealers said, after U.S. Secretary of State Marco Rubio said oil producer Chevron's CVX.N U.S. license to operate in Venezuela will expire on May 27 as planned.

Mars traded flat to U.S. West Texas Intermediate crude. It had traded at a discount of 30 cents on Wednesday on reports that U.S. President Donald Trump's administration would extend Chevron's CVX.N deadline to halt its operations in Venezuela by another 60 days.

Meanwhile, the Organization of the Petroleum Exporting Countries and its allies, known collectively as OPEC+, is discussing whether to make another large output increase at its meeting on June 1, Bloomberg News reported.

The cash roll from June to July traded at 75 cents. Traders use the three-day roll trade to square positions and manage exposure.

* Light Louisiana Sweet WTC-LLS for June delivery was unchanged at a midpoint of a $2.50 premium and was seen bid and offered between a $2.25 and $2.75 a barrel premium to U.S. crude futures CLc1

* Mars Sour WTC-MRS firmed to parity and was seen bid and offered between a discount of 20 cents and 20-cent a barrel premium to U.S. crude futures CLc1

* WTI Midland WTC-WTM eased 5 cents to a midpoint of a 60-cent premium and was seen bid and offered between a 40-cent and 80-cent a barrel premium to U.S. crude futures CLc1

* West Texas Sour WTC-WTS was seen bid and offered between a discount of 10 cents and 30-cent a barrel premium to U.S. crude futures CLc1

* WTI at East Houston WTC-MEH, also known as MEH, traded between a 50-cent and $1.00 a barrel premium to U.S. crude futures CLc1

* ICE Brent July futures LCOc1 fell 47 cents to $64.44 a barrel on Thursday

* WTI July crude CLc1 futures fell 37 cents to $61.20 a barrel on Thursday.