The pisser is the US has far more oil sand to tap then Canada... but we don't use it
United States taps Alberta oilsands expertise
University of Alberta By Gordon Jaremko, CanWest News Service
"
An estimated 10 billion barrels could be produced with known, limited American oilsands technology -- enough to satisfy all current U.S. oil demand for 16 months."
Work on U.S. Oil Sands Heating Up
Smithsonian/NASA ADS General Science Abstract Service (abstract hosted at Harvard)
...and much more information available from a quick search.