Quote from Trader KGB:
Nonsense.
Oil is settled physically at each expiration and all paper investors are forced to roll forward. When paper investors sell the current month to roll forward, all that's left are the physical buyers and sellers (i.e. no influence from the oil-as-an-asset-class crowd at this point). Notice oil doesn't crash at each expiration, there is ample demand for physical at the prevailing price.
The reasons we have $70+ oil instead of the recessionary norms of oil prices in the teens can be largely traced to demand from emerging markets (specifically India & China) that wasn't nearly as large in prior US recessions. Fiat currency devaluation is a significant factor as well. Gold wasn't $1240/oz when oil was $10.
Although the US is the largest oil consumer, looking at only US-metrics (inventory levels) to judge the price of a global commodity is rather folly (let alone not taking currency devaluation into account, higher oil extraction costs, etc).