August RBOB had a gap higher open Tuesday evening, helped in part by private industry data that showed an unexpected drawdown in gasoline supplies last week. The prices action came in contrast to weak reversal action seen during Tuesday's trade, with an early rally to the highest level since May 11th followed by a negative close. Expectations for this morning's EIA inventory report are for US gasoline stocks to have increased around 1.1 million barrels last week, which comes in close proximity to the five-year average build of 800,000 barrels.