Mobilgard? ADL Series oils have been designed for high Brake Mean Effective Pressure (BMEP) medium- and high-speed diesel engines operating on distillate fuels.Mobilgard? ADL 30 and Mobilgard? ADL 40 oils each have a balanced formulation which combats lacquer formation and deposits in severe service applications. Superior load carrying properties help to minimise piston ring and liner wear, and also make the lubricants suitable for marine gearing applications.