The oils in the Mobilgard HSD CI-4 series from Mobil are extra high-performance engine oils specifically developed for use in heavily loaded high-speed marine diesel engines. The products' advanced chemical formulation provides outstanding performance in both modern, demanding low-emission diesel engines and older diesel engines operating on low or high sulfur diesel. The Mobilgard HSD CI-4 series is approved or recommended by the major manufacturers of high-speed marine diesel engines.

SAE 15W-40 – Ash, sulfated ASTM D874 1.3 wt% – Density at 15°C ASTM D4052 0.87 kg/l – Flash Point, Cleveland Open Cup ASTM D92 223°C – Viscosity at 100°C ASTM D445 14.2 mm2/s – at 40°C ASTM D445 109 mm2/s – Pour Point, °C, ASTM D97 -33°C – Total Base Number ASTM D2896 10 mg KOH/g – Viscosity Index ASTM D2270 133