Petroleum product prices
 Crude oil imports and exports
 Crude oil demand
 Petroleum product imports and exports
 Refinery activity and fuel use
 Ethanol demand and price
 Combined heat and power (CHP)
 Natural gas plant liquids production
 Processing gain
 Capacity additions
 Capital expenditures
 Revenues

  Petroleum product demand by sector
 Domestic crude oil production
 World oil price
 International crude oil supply curves
 International product supply curves
 International oxygenates supply curves
 Natural gas prices
 Electricity prices
 Natural gas production
 Macroeconomic variables
 Biomass supply curves
 Coal prices

 Processing unit operating parameters
 Processing unit capacities
 Product specifications
 Operating costs
 Capital costs
 Transmission and distribution costs
 Federal and State taxes
 Agricultural feedstock quantities and costs
 CHP unit operating parameters
 CHP unit capacities