OPIS provides wholesale rack prices for fuels, offering independent data resources to verify supplier prices, reconcile invoice discrepancies, negotiate better rack supply contracts, and identify buying/selling opportunities in the wholesale energy market. Wholesale rack purchases are made along a fuel distribution system, typically a pipeline, in transactions of approximately 8,000 gallons at 1,500 terminals across nearly 400 market locations in the U.S. OPIS also provides supplier-posted wholesale propane rack and contract pricing and biodiesel pricing for U.S. markets. International gasoline and diesel rack pricing is available for Mexico, Canada, and Australia. OPIS is the energy industry’s rack price benchmark, bringing price visibility into an obscure marketplace for over 40 years. Billions of gallons of gasoline and diesel sold in the U.S. are based on OPIS rack price benchmarks.