Further gains were tempered by US data showing a small gain in gasoline stocks versus an expected large draw.
A significant gain in crude stocks weighed heavily on oil futures.
US Gulf Coast cash gasoline markets surged in early trading on Wednesday on reports that a tropical storm in the Caribbean will reach hurricane strength before it hits the country's largest energy producing region, traders said.
Repairs on a fluidic catalytic converter unit at ExxonMobil's 560,500 barrel per day Baytown refinery were continuing on Wednesday, a spokeswoman said.
The 90,000 bpd unit was shut on Aug. 16.
The gasoline and naphtha glut that has plagued refiners for most of the year should start to ease with the upcoming maintenance season.
European refinery turnarounds are set to peak at around 1.1 million barrels per day (bpd) in mid-September, less than half the volume that was out during the same period last year but globally, the turnaround outage will be larger at roughly 7 percent of global refinery throughput.
Naphtha supplies have tightened owing to lower Russian exports but that was balanced out by lower Asian demand, one trader said.
GASOLINE
There were no Eurobob trades during the afternoon trading window.
There was a bid at $484 a tonne fob ARA but no offers.
Some 16,000 tonnes traded in the morning at $480-$486 a tonne fob ARA, up from $474-$475 a tonne fob ARA on Tuesday.
Gunvor, Total and Statoil sold to Rolympus, Varo, Shell Trafigura and BP.
There were two trades of premium unleaded gasoline barges both at $491 a tonne fob ARA, lower than discussions of $495-$497 a tonne fob ARA the previous day.
The September swap stood at around $484 a tonne at the close, up from $489.50 a tonne.
Gasoline barge refining margins rose over $2 to their highest level since Aug. 8 at 10.08 a barrel, up from $7.73 a barrel around the same time on Tuesday.
Brent crude oil futures were down $1.13 cents at $48.83 a barrel by 1547 GMT.
US August RBOB gasoline futures were down 0.61 percent at 1.4897 a gallon.
The US gasoline crack was trading at $12.36 a barrel.
NAPHTHA
There was no activity in the window. In the previous session, a cargo traded at $397 a tonne cif NWE.