* Diesel demand in the barge market was slow on Tuesday, with a single barge changing hands in the afternoon trading window.

* Looming refinery maintenance in Europe is expected to support margins, traders said.

* Traders expect about 1.5 million barrels per day (bpd) of refining capacity to be offline in Europe in September.

* BP said it will begin a planned shutdown at the end of August on "some production facilities" at the Scholven site of its Gelsenkirchen oil refinery in Germany.

* Various units at the plant will be shut down for about seven weeks, BP said.

* Industry monitor Genscape detected slowing furnace stack activity on the vacuum distillation and fluid catalytic cracking units at Total's Antwerp oil refinery. Total declined to commend on the plant's operations.