Biodiesel F.A.Q.'s Please click on the questions below to find out more about RMSE's premium biodiesel fuel.  For additional questions please call us at (303) 544-1500. What is biodiesel? Where will I buy RMSE's biodiesel fuel? When will the biodiesel be available for sale? What makes RMSE’s biodiesel so cost competitive? Why is RMSE’s biodiesel so good for the environment? Click here to download the RMSE Biodiesel   Fact Sheet