Anyone who thinks this war is for oil should educate themselves on the oil industry a little first. The only benefit the US could possibly get out of this, related to oil, is that if a future, free Iraq were to pull out of OPEC. Not likely. Assuming the US wins the war, and upgrades the oil fields, this will definitely enrich Iraq, which is a good thing IMHO. This will not significantly bring down the price of oil. OPEC will still try to match demand to keep crude in the mid $20's. OPEC has always been able to overproduce.
Assuming Iraq leaves OPEC, then oil would of course become cheaper. However, it would be many years before this difference in price would begin to pay for this war and the numerous detrimental economic effects it has had, and will have in the future.
So we are going to war on the offhand chance that Iraq will leave OPEC when "free"? No Way. There is a whole list of reasons for this war which are far more plausible.
Jay