US Cash Crude-Grades fall as OPEC+ opts to releases more barrels in September

Aug 4 (Reuters) - Grades broadly fell on Monday, dealers said, as traders digested news that major producer group, OPEC+ has agreed to hike output again in September.

The group agreed on Sunday to raise oil production by 547,000 barrels per day for September, the latest in a series of accelerated output hikes to regain market share.

The move marks a full and early reversal of OPEC+'s largest tranche of output cuts plus a separate increase in output for the United Arab Emirates amounting to about 2.5 million bpd, or about 2.4% of world demand.

On the demand side, U.S. oil refiners are expected to have about 193,000 bpd of capacity offline in the week ending August 8, increasing available refining capacity by 31,000 bpd, research company IIR Energy said on Monday.

Offline capacity is expected to fall to 171,000 bpd in the week ending August 15, IIR added.

Elsewhere, U.S. President Donald Trump said on Monday he will substantially raise tariffs on goods from India over its Russian oil purchases.

Two Indian government sources told Reuters over the weekend that India will keep purchasing oil from Russia despite Trump's threats.

* Light Louisiana Sweet WTC-LLS for September delivery fell 12 cents to a midpoint of a $1.98 premium and was seen bid and offered between a $1.70 and $2.25 a barrel premium to U.S. crude futures CLc1

* Mars Sour WTC-MRS fell 20 cents to a midpoint of a parity and was seen bid and offered between a discount of 10 cents and 10 cents a barrel premium to U.S. crude futures CLc1

* WTI Midland WTC-WTM was unchanged at a midpoint of a 35-cent premium and was seen bid and offered between a 25-cent and 45-cent a barrel premium to U.S. crude futures CLc1

* West Texas Sour WTC-WTS fell 5 cents to a midpoint of a 25-cent discount and was seen bid and offered between a 35-cent and 15-cent a barrel discount to U.S. crude futures CLc1

* WTI at East Houston WTC-MEH, also known as MEH, traded between a 50-cent and 70-cent a barrel premium to U.S. crude futures CLc1

* ICE Brent October futures LCOc1 fell 91 cents to settle at $68.76 a barrel

* WTI September crude CLc1 futures fell $1.04 to settle at $66.29 a barrel

* The Brent/WTI spread WTCLc1-LCOc1 widened 1 cent to last trade at minus $3.48, after hitting a high of minus $3.40 and a low of minus $3.49