Mobil Delvac MX™ 15W-40 is a high-performance mineral engine oil recommended for use in marine high-speed diesel engines, offering outstanding performance across all types of engines including modern, demanding low-emission diesel engines and existing diesel engines. Major engine builders have approved it.
Mobil Delvac MX 15W-40 oil offers potential operational benefits, including:
High output, low emission diesel engines significantly increase the demands on engine lubricants. Tighter engine designs reduce oil consumption, resulting in less fresh oil make-up to replenish depleted additives. Top piston fire rings are located higher on the piston bringing the oil film closer to the combustion chamber where higher temperatures increase thermal stress on the lubricant. Increased fuel injector pressure and retarded timing improve fuel burn efficiency, but also increase engine temperatures and increase soot loads. Mobil Delvac MX 15W-40 is formulated from high performance base oils and a superior balanced additive system to provide optimum engine performance in modern diesel and gasoline engines as well as older models. The key benefits include:
Features | Advantages and Potential Benefits |
High thermal and oxidation stability | Reduced sludge build-up, deposits and viscosity increase |
TBN reserves | Deposit control and acid neutralisation |
Stay-in-grade shear stability | Wear protection and viscosity control |
Advanced detergency/dispersancy | Cleaner engines and longer component life |
Improved soot handling | Improved viscosity control and used oil pumpability |
Excellent low temperature properties | Start-up wear protection |
Component compatibility | Longer gasket and seal life |
Meets demanding specifications of key OEMs | One engine oil for mixed fleet operations |
Mobil Delvac MX 15W-40 | |
Caterpillar | ✓ |
Cummins | ✓ |
Volvo | ✓ |
Daihatsu | ✓ |
Mitsubishi | ✓ |
Recommended by ExxonMobil for use in:
Mobil Delvac MX 15W-40 | |
SAE Grade | 15W40 |
Viscosity, ASTM D 445 | |
cSt @ 40ºC | 117 |
cSt @ 100ºC | 15.5 |
Viscosity Index, ASTM D 2270 | 140 |
Sulfated Ash, wt%, ASTM D 874 | 1.3 |
Total Base # , mg KOH/g, ASTM D 2896 | 12 |
Pour Point, ºC, ASTM D 97 | -33 |
Flash Point, ºC, ASTM D 92 | 230 |
Density @ 15ºC kg/l, ASTM D 4052 | 0.88 |