Base Oil / Base Stock Synthetic Oils, Greases, and Lubricants
Last Updated: February 12, 2025
Description
Base oil or base stock synthetic oils, greases, and lubricants are formulated fluids designed to provide specific lubrication properties. These products are created by chemically reacting lower molecular weight materials to produce a fluid of higher molecular weight, which is engineered to deliver predictable properties. They are often combined with additives to enhance their performance characteristics.
Working Principle
Synthetic base oils work by utilizing a molecular structure that is designed to provide consistent and predictable properties. Unlike mineral oils, which are a mixture of naturally occurring hydrocarbons, synthetic oils are composed of uniform molecules that offer improved performance. This uniformity allows synthetic oils to provide better lubrication, especially in extreme temperatures, and resist oxidation and thermal breakdown. Their chemical stability and ability to maintain viscosity under varying conditions make them particularly useful in demanding applications.
Applications
Synthetic base oils are used in a variety of applications where their superior properties are beneficial. For example, they are commonly used in high-performance engines, where they provide better lubrication and fuel economy. They are also used in industrial machinery that operates under extreme temperatures or conditions, such as turbines and compressors, where their resistance to oxidation and thermal breakdown is crucial.
Advantages over other Synthetic Oils, Greases, and Lubricants
Synthetic base oils offer several advantages over mineral oils, including improved chemical stability, better lubrication at low temperatures, and enhanced fuel economy in specific engines. They are also more resistant to oxidation, which extends their useful life and reduces the frequency of oil changes. These properties make synthetic oils a preferred choice in applications where performance and reliability are critical.
Limitations
Despite their advantages, synthetic base oils have some limitations. They can decompose in certain industrial environments and may crack plastic components that come into contact with them. Additionally, they can come out of suspension in leaded fuels, which are still used in some aviation applications. These factors must be considered when selecting synthetic oils for specific uses.
Considerations
When considering synthetic base oils, it is important to evaluate the initial costs, which can be higher than those of mineral oils. However, their longer lifespan and reduced maintenance requirements can offset these costs over time. Operating expenses may be lower due to improved fuel economy and less frequent oil changes. Durability and reliability are generally enhanced, but compatibility with existing equipment, such as seals and paints, should be reviewed to avoid potential issues.
from ExxonMobil Chemical Company - Synthetic Base Stocks
Esters. Ranging from disbasic to polyol, Esterex ™ esters are organic esters well-suited for lubricant applications, including automotive, textile, industrial, aviation, turbine and compressor lubricants. They can be used as a stand-alone base stock or in combination with other fluids. Most... [See More]
- Type / Function: Base / Process Oil
- Viscosity Index: 149
- Kinematic Viscosity: 9.5
- Specific Gravity: 0.9280
from ExxonMobil Chemical Company - Synthetic Base Stocks
Available in high- and low-viscosity grades, Synesstic ™ AN (Alkylated Naphthalene) base stocks are well-suited for lubricants in a variety of automotive and industrial applications. Lubricants formulated with Synesstic AN can be more stable and higher performing. Synesstic AN is particularly... [See More]
- Type / Function: Base / Process Oil
- Viscosity Index: 105
- Kinematic Viscosity: 109.0
- Specific Gravity: 0.8870
from ExxonMobil Chemical Company - Synthetic Base Stocks
High viscosity polyalphaolefins. SpectraSyn ™ Hi Vis PAO is used to increase base stock viscosity and upgrade lubricant quality with blend components especially suited for industrial oils requiring high stability under harsh operating conditions. [See More]
- Type / Function: Base / Process Oil
- Viscosity Index: 170
- Kinematic Viscosity: 1240.0
- Specific Gravity: 0.8530
from ExxonMobil Chemical Company - Synthetic Base Stocks
Low viscosity polyalphaolefins. Available in viscosity ranges between 2 to 10 cSt at 100 °C, SpectraSyn ™ Lo Vis (Low Viscosity) PAO (polyalphaolefins) are used to formulate synthetic lubricants and for upgrading mineral oil base stocks. Formulators add SpectraSyn Lo Vis PAO to mineral... [See More]
- Type / Function: Base / Process Oil
- Viscosity Index: 137
- Kinematic Viscosity: 66.0
- Specific Gravity: 0.8350
from ExxonMobil Chemical Company - Synthetic Base Stocks
SpectraSyn Elite ™ metallocene polyalphaolefin (mPAO) advanced synthetic base oil is a high-performance polyalphaolefin (PAO) designed to provide you with better blending efficiency and performance capabilities than conventional synthetic PAO. SpectraSyn Elite mPAO base oil offers formulators... [See More]
- Type / Function: Base / Process Oil
- Viscosity Index: 210
- Kinematic Viscosity: 1649.0
- Specific Gravity: 0.8490
from ExxonMobil Chemical Company - Synthetic Base Stocks
Polyalphaolefin plus. SpectraSyn Plus ™ polyalphaolefins (PAO) provide an unsurpassed combination of volatility and low-temperature fluidity (Noack and CCS viscosity) relative to conventional PAO. Benefits. Extended drain intervals. Improved energy efficiency. Enhanced wear protection. Wide... [See More]
- Type / Function: Base / Process Oil
- Viscosity Index: 120
- Kinematic Viscosity: 1649.0
- Specific Gravity: 0.8160
from SantoLubes LLC
SANTOLUBE MCS-2408 is a unique, high performance polyester fluid suitable for use as a base stock for designing lubricants for applications involving prolonged operation at high temperatures. SANTOLUBE MCS-2408 has low viscosity, excellent low temperature properties, and low volatility. These... [See More]
- Type / Function: Base / Process Oil
- Kinematic Viscosity: 48.7
- Type: Non-soluble or Straight Oil
- Pour Point: -65