Oil companies profits hover around 9% which is about right for most business. The cost of Oil has been driven up by speculators by (some estimates) 60%
By lowering interest rates and giving money to banks, the Fed has allowed this to happen. People expect inflation. They must invest in things that will not lose value during an inflationary period. (e.g. oil and food). Of course, that raises the price of oil and food. Inflation becomes a self-fulfilling prophecy. Also, lowering interest rates substantially below the EU's forced investors to move their dollars into the Euro, which has killed the dollar, and therefore raised the price of oil and food.