* In refining a barrel of crude oil, U.S. refiners like Valero (VLO), Tesero (TSO) or Conoco Phillips (COP) produce roughly two units of gasoline for every one unit of diesel/heating oil products...meaning that the crack margin from gasoline (vs. heating oil) is far more important to the earnings momentum of U.S. oil refiners
Data Courtesty: Daniel Dicker, Thestreet.com, snagged on 3/18/08.
Full Disclosure: I currently own shares of COP.