Nonetheless, investors need not fear or steer clear of oil stocks as there are still a handful of them that are showing strength in this shaky period. In particular, with oil prices cooling off, U.S. downstream (refining and marketing) stocks have been notching up healthy gains. This is apparent in the earnings surprise history of major refiners like Valero Energy Corporation VLO and EnLink Midstream, LLC ENLC which consistently surpassed market expectations in each of the last four quarters.