Mobil Delvac 1™ Advanced Fuel Economy

Advanced full synthetic, high-performance diesel engine oil

Mobil Delvac 1™ Advanced Fuel Economy 5W-30 is an advanced full synthetic, high-performance diesel engine oil that meets or exceeds leading industry and original equipment manufacturer (OEM) fuel economy specifications.

Mobil Delvac 1 Advanced Fuel Economy 5W-30 engine oil features an advanced low-ash formulation that delivers exceptional protection for most engine and exhaust aftertreatment parts. Its cutting-edge technology provides:

  • Best-in-class fuel economy potential*
  • Extended oil drain interval (ODI) potential up to 3X the average OEM ODI recommendation
  • Long engine life and reliable operation in a wide range of applications
  • Emission system protection

Tested and developed with the consideration of different diesel fuel qualities, Mobil Delvac 1 Advanced Fuel Economy 5W-30 engine oil was designed to protect engines with the use of biofuel components. Mobil Delvac 1 Advanced Fuel Economy 5W-30 engine oil should only be used where an API FA-4 oil is recommended by the OEM. Before using this product in an engine, users should consult recommendations as shown in an owner's manual or other service bulletins.

Mobil Delvac 1 Advanced Fuel Economy 5W-30 diesel engine oil is recommended by ExxonMobil for use in:

  • Heavy-duty, low-emission diesel engines where API FA-4 is recommended by the engine builder/OEM, utilizing technologies such as diesel particulate filter (DPF), selective catalytic reduction (SCR), continuously regenerating traps (CRT), diesel oxidation catalysts (DOC) and exhaust gas recirculation (EGR)
  • Heavy-duty diesel engines using low-sulfur diesel fuels and many biodiesel fuel formulations
  • Direct-injection or naturally aspirated and turbocharged, diesel-powered equipment
  • On-highway short-haul and long-haul trucks and buses

Features and benefits

  • Enhanced fuel economy potential and extended oil drain interval capability make this product our most sustainable offer we provide for your business and the environment
  • Emission system protection that can contribute to system durability and performance
  • Unsurpassed oxidation stability that helps reduce engine deposits to keep engines running reliably
  • Biofuel compatibility maintains engine cleanliness and protection with biofuel components
  • Excellent protection against oil thickening and degradation contributes to extended oil drain interval capability, helping to reduce the number of oil changes and oil disposal needs

*Relative to conventional 15W-40 engine oil, and within Mobil Delvac 1™ product range.
Actual fuel economy improvement dependent on vehicle/engine type, outside temperature, driving conditions and the viscosity of current engine oil.
Average OEM ODI recommendation based on recommended oil drain intervals from major U.S. engine manufacturers using API CJ-4 oils for a variety of service severity levels and engine models. Average OEM ODI API CJ-4 recommendation to substantiate multiplier claims is 31,750 miles. Results may vary based on vehicle/engine condition, driving and environmental conditions. Consult OEM or ExxonMobil before implementing extended ODIs, especially if the equipment/vehicle is under the OEM’s warranty.
Based on measured viscosity increase in the Volvo T-13 test.

Specifications, approvals and technical details

Specifications and approvals  

Mobil Delvac 1 Advanced Fuel Economy 5W-30 engine oil meets or exceeds the requirements of:

  • API FA-4, SN
  • Cummins CES 20087
  • JASO DH-2

Mobil Delvac 1 Advanced Fuel Economy 5W-30 engine oil is approved by the following OEMs:

  • Detroit Fluids Specification 93K223

Technical details  

SAE Grade 5W-30
Viscosity, ASTM D 445  
cSt @ 40ºC 62
cSt @ 100ºC 10.2
CCS, cP, ASTM D 5293 6,310 @ -30ºC
MRV, cP, ASTM D 4684 16,400 @ -35ºC
HTHS @ 150ºC, cP, ASTM D 4683 3.2
Viscosity Index, ASTM D 2270 153
Sulfated Ash, wt%, ASTM D 874 1
Total Base #, mg KOH/g, ASTM D 2896 11
Pour Point, ºC, ASTM D 97 -42
Flash Point, ºC, ASTM D 92 238
Density @ 15ºC kg/l, ASTM D 4052 0.850
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