Overnight weakness in July RBOB managed to hold above the previous session's low and rebound during the early morning hours. It is possible that some of the support in the RBOB market came from an improvement in the outside market tone, as well as from headlines yesterday that a large crude distillation unit in Port Arthur Texas could be down for at least two months. US Department of Energy data released late Monday showed weekly retail gasoline prices falling another $0.04 last week to an average of $3.572 per gallon.