NYMEX - New York Mercantile Exchange

The New York Mercantile Exchange, Inc., is the world's largest physical commodity futures exchange and the preeminent trading forum for energy and precious metals. Through links on this site, you can view historic energy price data, access market trend information, and view current session futures prices.
New York Mercantile Exchange
EIA - Energy Information Administration

The Energy Information Administration (EIA), created by Congress in 1977, is a statistical agency of the U.S. Department of Energy. The EIA provides policy-independent energy data, analysis, and forecasts.
Energy Information Administration
API - American Petroleum Institute

American Petroleum Institute, the U.S. oil and natural gas industry’s primary trade association. The API web site provides industry statistics, public policy issues, petroleum industry training materials, and additional petroleum industry information and resources.
American Petroleum Institute
OPIS - Oil Price Information Service

The Oil Price Information Service tracks more than 70,000 rack prices for heating oil, gasoline, diesel and kerosene, and thousands of contract prices for jet fuel, LP-gas, residual fuel, and ethanol. In addition, this site also reports on breaking stories that affect the petroleum industry.
Oil Price Information Service
PLATTS

Platts provides energy market information, breaking news, and pricing benchmarks for the oil, natural gas, electricity, nuclear power, coal, petrochemical and metals markets.
Platts