VLO has run up pretty far.. I went to one of my little sources and found some recent info. on it though:
VLO - Oil. Enough said? Right now oil is what moves the world and the world consumption is not going to reduce. US consumption continues to increase 2-3% a year. China and India consumption increases are double digit and will likely continue for decades to come. One day Putnin will die or be assinated and maybe (very doubtful) the Russian's might actually become a capitalistic type system and become a manufacturing force. The point is that oil is the driver to growth. There is plenty of oil. The questions are often of what quality is the oil and what is the degree of difficulty to extract it. The former question is what concerns VLO. Using sour crude instead of sweet crude to manufacture gasoline will remain profitable with sweet crude remaining over $30/barrel. If you think sweet crude is heading below $25 a barrel over the next several years, then VLO is likely not where you want to be for the long haul. Too many concerns -- World War (actually, I could see this helping as much as hurting), terrorism, hurricanes, new inexpensive source of fuel, wackos/government deciding that extraction of sour crude or it's refining is hazardous to the environment and placing additional taxes on it specifically, and etc. However, it world conditions remain similiar as they are today then VLO has very good potential.
don't know anything about stx