Lubricating Oil, Fuel, and Filters for Natural Gas-Fueled Engines, DDC-SVC-BRO-0005, specifies the type of lubricants, fuels, filters, and related maintenance intervals required for the natural gas-fueled engines manufactured and marketed by Detroit Diesel®. The information in this publication applies to Series 60G, Series 50G, and Series 30G On-Highway and Off-Highway applications. DDC-SVC-BRO-0005