U.S. Gulf Coast conventional gasoline and diesel gained on Friday after Marathon Petroleum Corp MPC.N shut down some units at its 596,000 barrel per day refinery in Garyville, Louisiana following a large fire, traders said.

Gulf Coast M2 conventional gasoline gained a cent, trading 28.75 cents higher than the gasoline futures benchmark RBc1 on the New York Mercantile Exchange, market participants said.

Gulf Coast 62-grade ultra-low sulfur diesel gained 0.11 cents, trading 5.15 cents per gallon below ULSD futures HOc1.

Trading was muted ahead of the weekend but product prices are likely to rise in major domestic spot markets next week if supplies are disrupted from Garyville, one of the biggest refineries in the United States, traders said.

ULSD and gasoline futures jumped after initial news about the fire around mid-afternoon. ULSD futures rose 15.11 cents to settle at $3.3075 a gallon, the highest since January 26.

Gasoline futures rose 9.64 cents to settle at $2.8764 a gallon.

Elsewhere in the spot markets, Chicago CBOB gasoline CBOB-DIFF-MC gained 17 cents, trading 11 cents per gallon below futures, traders said.

Chicago gained 9.5 cents, trading 28 cents per gallon below futures.

Group 3 V-grade gasoline gained 2.25 cents, trading 12.5 cents lower than the benchmark.

In New York Harbor, M2 conventional gasoline was little changed, trading 5.5 cents per gallon above futures, traders said.

Diesel for delivery in New York Harbor fell half a cent, trading 0.5 cents per gallon below futures, traders said.

Renewable fuel (D6) credits for 2023 traded for $1.40 each on Friday, traders said. That compares with trades in a range between $1.39 and $1.40 each on Thursday.

Biomass-based (D4) credits also traded for $1.40 each, a penny higher than Thursday.
Source: Reuters (Reporting by Shariq Khan, additional reporting by Mark Weinraub; Editing by Alistair Bell)