Wedoany.com Report-Mar 21, Phillips 66's (PSX.N), 356,500 barrel-per-day Wood River refinery is undergoing a turnaround, research company IIR Energy said on Thursday.

A general view of the Phillips 66 refinery, as seen from the corner of Fifth Street and California Street in Rodeo, California, the oldest oil refining town in the American West, U.S. December 6, 2022.

The refinery, in Roxana, Illinois, began maintenance activities last week, IIR said.

.Ongoing maintenance work at the refinery's 170,000-bpd crude distillation unit, 50,000-bpd vacuum flasher, 42,000-bpd catalytic cracker unit, and associated gas plant units is expected to continue until late April.

The Wood River refinery produces transportation fuels including gasoline, diesel and aviation fuel.

A Phillips 66 spokesperson declined to comment on refinery operations.