Key Commodity Prices & Differentials (Excel) Key Commodity Prices & Differentials (PDF) Department of Energy Statistics Basics of Refining and Coking Refining 202: Desulfurization and Hydrocracking Basics of Market Fundamentals The historical data presented here is presented for informational purposes only. It is not intended to be an indicator of Valero's past or future financial results. The information was compiled from sources outside Valero. Valero does not make any representation as to the accuracy of the data and does not undertake any obligation to update, revise or continue to provide the data. The Valero companies, its information providers, and other third parties involved in or related to the making or compiling of any of the data listed above make no representations or warranties of any kind, either express or implied, with respect to the data (or the results to be obtained by the use thereof) and expressly disclaim all warranties and representations as to the data or use thereof.