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High viscosity polyalphaolefins  

Today’s lubricant marketplace demands enhanced performance capabilities, improved flow at low temperatures and better durability. SpectraSyn™ Hi Vis (High Viscosity) PAO (polyalphaolefins) feature low-temperature properties, low volatility and improved thermal stability. Their high viscosity indices translate into improved flow at low temperatures and increased film thickness at high temperatures. In addition to being shear stable and hydrolytically stable, they have good compatibility with mineral oils.

Available in 40 and 100 cSt at 100°C viscosities, SpectraSyn Hi Vis PAO base stocks are particularly well-suited for industrial oils requiring high stability under extreme operating conditions. They are frequently used with lower-viscosity fluids (PAO, mineral oils) as a viscosity booster to achieve a wide range of ISO VG industrial and automotive gear oils.

Key benefits

  • Shield icon

    High VI for enhanced wear protection and energy efficiency

  • low volatility icon

    Low volatility to minimize oil consumption

  • Thermometer icon

    Low-temperature fluidity for optimal flow

  • Excellent thermal and oxidative stability icon

    Excellent thermal and oxidative stability for long drain intervals

Product data

  • ExxonMobil Chemical Page

    SpectraSyn™ Hi Vis (High Viscosity) PAO

    Discover technical details and specifications for SpectraSyn Hi Vis PAO product grades.

    View data sheets
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Enhanced performance

Oxidative stability

Good oxidative stability is essential for applications at elevated temperatures with air contact. In our proprietary oxidative stability test, we compared a Group II mineral oil with SpectraSyn Hi Vis PAO (viscosity grades 40 and 100 cSt) base stocks. The oils included 2% antioxidant and were tested at 163°C (325°F) for 72 hours. Both SpectraSyn Hi Vis PAO grades demonstrated excellent oxidative stability, outperforming the Group II.

oxidation stability test chart for mineral oil group II and PAO

Typical properties*  

Spectrasyn 40 Spectrasyn 100 chart with flash and pour point temperatures.

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™ high viscosity polyalphaolefin (PAO) product safety summary

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

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  • 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
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