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Two large container vessels docked with loaded cargo at a container port requiring environmentally acceptable ester base oil lubricants

Ester base oils

Esters are a class of synthetic chemistry that are generally created in the reaction between a carboxylic acid and an alcohol. Our ester base oils are a broad and diverse family of Group V synthetic base stocks which can be customised to meet specific physical and performance properties. We have developed an industry leading range of Priolube™ ester base oils.
Marine engine for ester base oils

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View our ester base oils

What properties can ester base oils offer formulated lubricants?

  • Biodegradability
  • Low toxicity
  • Reduced friction
  • Reduced wear, high temperature stability
  • Low temperature flowability
  • Low volatility
  • Clean burn properties
  • High viscosity index
  • Reduced flammability
  • Excellent solvency properties.

Esters have been components in the formulation of lubricants for many years and are the preferred base oil in many severe applications. The percentage of ester oil used can vary anywhere from 1 to 99% depending upon the desired properties and the type of ester employed.

What types of esters do we offer?

As a world leader in the supply of environmentally acceptable base oils, our ester product range includes;

  • Complex
  • Mono
  • Petrochemical
  • Trimellitate
  • Self-emulsifying
  • Saturated and unsaturated esters.

These esters are individually suited to challenges that can arise in industrial, marine, aviation and automotive applications.

Whitepaper: Esters, the most versatile of base stock technologies

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Wallchart: Priolube™ esters

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Yacht sailing through open water using environmentally acceptable lubricants

How can I formulate environmentally acceptable lubricants (EALs) with esters?

Many of our products designed for environmentally sensitive areas are made using renewable and sustainable raw materials; almost all are ultimately biodegradable and have low toxicity towards aquatic organisms. Our products are also European Eco Label certified (on the LuSC list), suitable for formulation under VGP and most are USDA Biopreferred®.
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European Ecolabel (LuSC list)

European (EU) Ecolabel for lubricants promotes the development and use of lubricating products with a reduced environmental impact. Lubricant products satisfying the requirements of European Ecolabel must be biodegradable, have low aquatic toxicity, and where palm oil or palm kernel oil is used, must be sustainably sourced.  

Whilst lubricants must comply with strict environmental criteria to be classed as Ecolabel compliant, they must also meet minimum technical performance standards.  
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Recommended products

Priolube™ 3970

Priolube™ 3970

Priolube 3970 is a low viscosity, oxidatively stable, low deposit forming polyol ester. It is a high performing lubricant and as it is a polyol ester it therefore has excellent oxidative stability and...

Priolube™ 3967

Priolube™ 3967

Priolube 3967 is a long chain unsaturated fatty acid ester, suitable for use as a synthetic base fluid in a range of applications.

Priolube™ 3987

Priolube™ 3987

Priolube 3987 is an ISO 150 oxidatively stable, biodegradable and hydrolytically stable ester, suitable for use in a wide range of automotive and industrial applications. It is also OSPAR Compliant...

Priolube™ 1938

Priolube™ 1938

Priolube 1938 is a high oxidatively stable, low volatility, hydrolytically stable ester providing enhanced lubrication performance.

Priolube™ 1973

Priolube™ 1973

Priolube 1973 is an ISO 46, oxidatively stable, biodegradable and hydrolytically stable ester, suitable for use in a wide range of automotive and industrial applications. It is European Ecolabel...

Priolube™ 3958

Priolube™ 3958

Priolube 3958 is a high-performing, low viscosity, synthetic lubricant base fluid and additive for automotive gear oil and transmission fluid applications.

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