Oil self-sufficiency isn't quite as simple as oil production > oil exports because not all crude is the same and refineries generally aren't completely crude-type-agnostic. IIRC US refineries prefer processing "heavy" (higher proportion of longer hydrocarbons) and "sour" (higher sulfur proportion) crude but most US production is "light" (higher proportion of shorter hydrocarbons) and "sweet" (lower sulfur proportion), so as a result the US still ends up importing/exporting a bunch of crude.