DoD direct spending on the war in Iraq was $758 billion.
Iraqi exports, mostly oil, reached $94.2 billion in 2012, and have totaled barely $441 billion from 2004 to 2012. We blow more than that on gasoline in a single year.
At the current US gasoline average price of $3.648/gallon, the 134.51 billion gallons of gasoline consumed in the US in 2013 is the equivalent of spending $490.7 billion.