traffic on highway

Polyalphaolefin plus  

To meet increasingly stringent emission regulations, automotive original equipment manufacturers (OEMs) demand lower and lower lubricant viscosity grades for engine and transmission oils. Formulators turn to lighter base oils, which typically have better low-temperature fluidity but also tend to have high volatility that can increase emissions and oil consumption.

With its exceptional combination of low volatility and low-temperature viscosity, SpectraSyn Plus™ PAO synthetic base stocks allow the formulator to further optimize their base stock blends to achieve the required performance.

SpectraSyn Plus PAO is available in three viscosity grades:

  • 3.6 cSt – Ideal for high-performance, low-temperature applications, such as greases and driveline fluids
  • 4 cSt – Suited to a wide range of automotive applications due to Noack, CCS and viscosity characteristics
  • 6 cSt – Suited for automotive and industrial applications that require good low-temperature and low-volatility performance.

Key benefits

  • low volatility icon

    Low volatility for extended drain intervals

  • improved energy efficiency icon

    Improved energy efficiency

  • Thermometer icon

    Low CCS viscosity for better engine starting and low-temperature oil flow

  • piggybank

    Cost-effective low-temperature and volatility performance when blended with mineral oils

Product data

  • ExxonMobil Chemical Page

    SpectraSyn Plus PAO

    Discover technical details and specifications for SpectraSyn Plus PAO product grades.

    View data sheets
  • chemist when time is not on your side no copy


    Download our product portfolio to find more information on our synthetic base stocks products.

    Download now

Viscosity and volatility

Enhanced volatility

In the ASTM D445 tests, SpectraSyn Plus PAO demonstrates a better balance of Kinematic viscosity (at 100°C) and Noack volatility compared to Group III and Group IV reference oils.

NOACK volatility and kinematic viscocity of group III, group IV, and SpectraSyn Plus PAO.

Improved volatility

ASTM D2270 measures the apparent viscosity of engine oils and base stocks between -5°C and -35°C using a Cold Cranking Simulator (CCS). Noack volatility is measured by ASTM D5800. SpectraSyn Plus PAO demonstrates improved volatility compared to a reference conventional PAO.

NOACK and low temp viscocity of PAOs

Industries and applications

Featured resources

View highlighted news, events, technical papers and case studies below. To see our full collection of resources, browse our Library.
  • ExxonMobil Chemical Library icon

    SpectraSyn Plus™ polyalphaolefin (PAO) product safety summary

    A high-level summary intended to provide an overview of product safety information on this chemical substance.

    Read more
  • ExxonMobil Chemical Library icon

    Synthetic lubricant base stocks formulation guide

    This convenient reference guide can provide a head start in helping you make the best choice of base stocks for a variety of lubricant applications.

    Read more
Don’t see what you’re looking for? Check out Quick links to explore additional content.

How would you rate the content on this page?