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Group II/II+ EHC™ base stocks  

We are committed to investing in Group II/II+ products through projects such as the expansion of our Baytown refinery, construction of our Group II facility in Rotterdam and the recently completed Singapore base stocks refinery expansion that brings enhanced-performance EHC™ base stocks to Asia Pacific. In April 2019, a further multibillion-dollar expansion of the integrated manufacturing complex in Singapore was announced, with start-up anticipated in 2023. These investments allow us to offer formulation and supply-chain flexibility around the world.

EHC™ base stocks are part of a global Group II slate as defined within API/ATIEL guidelines for formulation and qualification of automotive and engine oil lubricants. With base oil interchange and viscosity grade read-across capabilities, EHC base stocks offer broad coverage that enables supply chain flexibility and simplified qualification testing requirements.

EHC base stocks may also be used in industrial and other applications where formulations benefit from increased oxidation stability and higher viscosity index (VI). Our rigorous processes ensure reliable delivery of consistent quality base stocks.

Key benefits

Consistent quality to help formulators produce high-performance blends that:

  • Meet or exceed industry requirements
  • Achieve optimum additive solubility and oxidation stability
  • Meet or exceed engine oil quality requirements
  • Offer cost savings through blending optimizations
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Major refinery expansions offer

improved global supply of enhanced base stocks.
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Sales specifications
EHC™ 45
EHC™ 50
EHC™ 65
EHC™ 110
EHC™ 120
Property Limits Standard method (a)



Clear and bright

Clear and bright Clear and bright Clear and bright Clear and bright
ASTM Color Max ASTM D1500 L0.5 0.5 L0.5 0.5 0.5
CCS viscosity -25ºC mPa•sec Max ASTM D5293 1550        
CCS viscosity -20ºC mPa•sec Max ASTM D5293   1500 3100    
Flash Point, COC Deg C Min ASTM D92 204 210 214 230 255
Kinematic viscosity @ 100ºC mm2/sec Min-Max ASTM D445 4.4-4.7 5.2-5.6 6.3-6.6 10.0-12.0 11.1-12.7
NOACK Volatility, wt% Max ASTM D5800 15 13.5 10    
Pour Point, Deg C Max ASTM D97 -18 -18 -18 -15 -15
Viscosity Index Min-Max ASTM D2270 113-119 110-119 103-109 95-110 105-115


    EHC™ 45 EHC™ 50 EHC™ 65 EHC™ 110 EHC™ 120
Americas     *   *   *
Europe, Africa, Middle East       *  

Asia/Pacific       *   *  

Our products are designed to meet the industry’s evolving specification requirements, providing quality you can rely on today and tomorrow.

(a) In lieu of standard test method, alternate test methods may be used for the certification of a product property.

Note 1: Products are certified on release to meet the values specified. Actual values may deviate within the established reproducibility of the test method specified.

Note 2: For purpose of determining conformance with specification, observed or calculated values shall be rounded off to the nearest unit in the last significant digit used in expressing the limiting value in accordance to the ASTM E 29 method

Health and Safety

Detailed health and safety information for this product is provided in the material safety data sheet (MSDS), available upon request through your local sales representative or from www.ExxonMobil.com

  • Clear base oils in beakers

    EHC 45 and EHC 65 base stocks outperform competitive Group II/III/II+ in tests

    In test after test, 5W-30 lubricants made with EHC 45 & EHC 65 Group II+/II base stocks outperformed competitive blends made with Group II/III or Group II+/II.

    See the results
  • EHC 65 and EHC 45 in petri dish

    Enabling enhanced formulations

    Advanced base oils and lubricants begin with advanced base stocks. Our EHC 45 and EHC 65 base stocks offer broad blend coverage, minimizing the need for Group III.

    Download the brochure
  • factory at night

    EHC™ Group II base stocks

    Click here to download information on EHC base stocks sales specifications and availability.

    Download PDF
  • EHC 50 and 110 brochure

    New products for new requirements

    Enhanced Group II EHC™ base stocks are now available in Asia Pacific to meet changing lubricant requirements.

    See the brochure