Base Oil Report: As per reports and information, American Refining Group, Inc.manufacturer of Brad Penn Lubricants,has added Biogas Engine Oils to its line of products. Brad Penn Biogas Engine Oils are intended for stationary gas engines. Enhanced alkalinity reserves allow for their use in applications where fuel gas is generated from anaerobic digestion of manure, compost and/or landfill residue. The Biogas Engine Oil SAE 40 is a high-ash-content (sulfated ash = 1.82% mass), high TBN (15) oil designed for use in stationary gas engines where influent biogas contains high levels of contaminants and corrosive agents such as hydrogen sulfide, organic halides and other harmful agents. The Medium Ash Biogas Engine Oil SAE 40 is used when the influent biogas has moderate levels of contaminants and corrosive agents.