Mobil™ HDEO 10W-30

Heavy Duty Engine Oil

Mobil HDEO 15W-40 and 10W-30 are oils designed to meet warranty requirements for high-speed, four-stroke heavy duty diesel engines. These products are formulated to maintain the durability of emission control systems, including diesel particulate filters and other advanced aftertreatment systems.

Mobil HDEO meets or exceeds the requirements of API service classifications CK-4, CJ-4, CI-4 PLUS, CI-4 and CH-4. These products are also approved by major original equipment manufacturers (OEM). 

Equipment lubricant recommendations

Our Mobil Serv℠ Product Selector tool will help you identify lubricant(s) for your specific equipment.



  • Recommended for heavy duty diesel applications including low emission engine designs and those featuring EGR.
  • Recommended for heavy duty diesel applications using older and naturally aspirated conventional designs.

Specifications and Approvals

Mobil HDEO meets or exceeds the requirements of: 15W-40 10W-30
API CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4 X X
Caterpillar ECF-3 X X
Cummins CES 20086, 20081 X X

Mobil HDEO is approved by the following OEMs: 15W-40 10W-30
Volvo VDS-4.5, VDS-4 X X
Mack EOS-4.5, EO-O Premium Plus X X
Detroit Fluids Specification 93K222, 93K218 X X
Ford WSS-M2C171-F1 X X
MTU Oil Category 2.1 X
Renault Trucks RLD-3 X X


Typical Properties

Mobil HDEO
SAE Grade 15W-40 10W-30
Viscosity, ASTM D 445
cSt @ 40ºC 112 81.3
cSt @ 100ºC 14.2 11.9
Viscosity Index, ASTM D 2270 132 140
Density @ 15.6ºC kg/L, ASTM D 4052 0.874 0.867
Pour Point, ºC, ASTM D 97 -27 -36
Flash Point, ºC, ASTM D 92 225 225
Sulfated Ash, wt%, ASTM D 874 1 1
Total Base Number, mg KOH/g, ASTM D 2896 10 10
CCS, cP, ASTM D 5293 5900 @ -20C 6550 @-25C
MRV, cP, ASTM D 4684 20000 @ -25C 22600 @ -30C
HTHS @ 150ºC, cP, ASTM D4683 4 3.6


Health and Safety

Based on available information, this product is not expected to produce adverse effects on health when used for the intended application and the recommendations provided in the Material Safety Data Sheet (MSDS) are followed. MSDSs are available upon request through your sales contract office, or via the Internet. This product should not be used for purposes other than its intended use. If disposing of used product, take care to protect the environment.