Welcome. Through the success of Tesoro’s customers, investors, and employees, we’ve become one of America’s larger independent petroleum refiners and marketers. As we’ve grown, we’ve listened carefully to our customers, neighbors, and regulators.  The political agenda today often includes talk of global warming and alternative fuels development.  As our nation considers these issues, we’re eager to stimulate, engage and contribute to these important debates.  

This website contains essential information for our customers, our employees, and the communities that we serve.  We encourage you to explore the information on Act Tesoro and communicate with elected officials and regulators on these important issues.