Mobilgard 570 Mobilgard™ 570 cylinder oil is designed to optimise the performance of two-stroke marine diesel engines operating on heavy fuel oil with a sulphur content of up to 3.5 per cent. Mobilgard 300 Mobilgard™ 300 by ExxonMobil is a premium quality, extra high performance system oil designed for crosshead diesel engines. Mobilgard 12 Series Mobilgard™ 12 Series high-performance diesel oils are designed for use in marine trunk piston engines operating on low sulphur distillate fuels. Mobilgard ADL 40 Mobilgard™ ADL Series oils have been designed for high Brake Mean Effective Pressure (BMEP) medium- and high-speed diesel engines operating on distillate fuels. Mobil Stern Tube Lubricant Mobil Stern Tube Lubricant is a high performance, high viscosity lubricant developed especially for the lubrication of Cedervall-type stern tube bearings used in ships and for certain bearings of ships' fin stabilizers.