Smokey the Bear's Gas Station

Is there really 40 barrels of oil in each tree?

This paragraph from this site: Congressman Sali informed us that a solution to the high price of gasoline was to make petroleum from "all those trees in our forests." Stunned by the comment, I suffered a momentary regret for not taking that high school chemistry class those many years ago. He continued by saying there '"could be up to 40 barrels of oil " in a single tree.

That would be Congressman Bill Sali (R-ID).