Are you an investor or a trader? As a trader, I don't really care about the fundamentals or the crack spread, but rather what my technical indicators tell me. Right now, my indicators say buy.
As an investor, I might be concerned about the crack spread, which for VLO, isn't as important as they are a refiner of sour crude, not the light sweet like many other refiners.
All I can tell you is this: don't book any carribbean cruises this fall. Hope that helps.