Since 1924, The American Petroleum Institute (API) has been the leader in developing equipment and operating standards for the oil and natural gas industry.
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API Chapter 11.1 C-Code: Temperature and Pressure Volume Correction Factors for Generalized Crude Oils, Refined Products, Special Applications, and Lubricating Oils (Flow-Cal website opens in a new window)
E&P Tanks Software:
Production Tank Emissions Model, a software program for estimating emissions from hydrocarbon production tanks (API Pbl 4697).
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Find information on the average price of gasoline at the pump, the countries the U.S. imports of oil and product from, state motor fuel tax rates and information on subscribing to API statistical reports and packages.
API Weekly Statistical Bulletin (WSB)
Sangea Statistical Software
Electronic Greenhouse Gas (GHG) emissions calculator tool for the petroleum and natural gas industry