Since then, USO has continued to lose vs USL in price, continuing the trend proving USL and DBO are better oil ETF's than USO.
Below is a comparison since Dec 21st, 2007. You can click here and choose different time periods, showing how in general, USO always does worse than USL and DBO.
The second image shows how Oil company ETF OIH has been better than all the oil ETF's, and that gold ETF GDX has also done great. Click here to change time periods and add other ETFs to compare against.