Chicago gasoline cash differentials fell on Friday after Exxon Mobil said operational issues at its Joliet refinery in Illinois had been resolved, easing supply constraints.

Operational issues reported by the 275,000 barrel-per-day Joliet refinery earlier this week, along with issues at other plants in the region, had caused a surge in gasoline differentials in the spot market.

Chicago CBOB gasoline (CBOB-DIFF-MC) fell 1.5 cents to 11 cents below the RBOB gasoline futures benchmark on the New York Mercantile Exchange, traders said.

Chicago ultra-low sulfur diesel (ULSD-DIFF-MC) gained 2 cents to 5 cents below the ULSD futures benchmark.

Elsewhere in the Midwest, Group 3 V-grade gasoline (RUV-DIFF-G3) was unchanged at 7 cents lower than the benchmark. ULSD (ULSD-DIFF-G3) gained a cent to 6.25 cents above futures.

U.S. Gulf Coast M2 conventional gasoline (RU-DIFF-USG) gained a cent to 8 cents below futures, market participants said. A2 CBOB gasoline (CBOB-DIFF-USG) also gained a cent to 12.5 cents above futures.

Gulf Coast 62-grade ULSD (ULSD-DIFF-USG) gained 0.10 cents to 5.25 cents below futures.

Oil futures posted their steepest weekly losses since the end of March as traders turned cautious ahead of a meeting of the OPEC+ group to decide its output policy for June, which was moved up from Monday, May 5, to Saturday, May 3.

Gasoline futures fell 2.93 cents to settle at $2.0199 a gallon, and ULSD futures fell 1.88 cents to $1.9932.

Renewable fuel (D6) credits (RIN-D6-US) for 2025 traded at 110.5 cents each, compared to between 108 and 110 cents each in the previous session, traders said.

Biomass-based (D4) credits (RIN-D4-US) traded at 118.5 cents and 119.5 cents each, compared with between 118 and 120 cents each previously, traders said.
Source: Reuters