The only firm forecasting major changes of direction in future prices.


The last six major changes in oil price called correctly.


Our work has been the foundation for achieving superior financial performance.


Unparalleled insight and continuity across multiple market cycles.


Groppe, Long & Littell provides analyses and forecasts that better position our clients to make long-term decisions concerning future business strategies. Learn about our services; our process; and our accuracy.

Oil and Gas Analysts and Forecasters with more than 130 years of combined oil industry experience, Groppe, Long & Littell provides a basis for informed business decisions in matters that involve the economics of the oil and gas industries. Periodic reports provide a thorough treatment of demand, supply and other factors that determine prices for crude oil and petroleum products worldwide and for natural gas in North America. Forecasts going out at least ten years are based on detailed technical assessments and sound application of economic principles. The scope and detail of its work distinguish the firm from other consultants, petroleum analysts and natural gas analysts.