Base Oils

Base Oils: The ClearGuard Commitment

Base oils are the backbone of many industrial systems. At ClearGuard, we specialize in delivering high-performance base oils hydrotreated to meet the evolving demands of manufacturing, energy, and process industries.

Our base oil portfolio is engineered for superior solvency, oxidation stability, and cold-flow performance: whether you're formulating greases, hydraulic fluids, or high-spec industrial lubricants. By leveraging exclusive access to Hydrodec’s patented hydrotreated process, we offer base oils that balance precision performance with environmental responsibility.

ClearGuard Base Oil

Our base oil is available from railcars to barrels, with full support and ongoing lifecycle management. Customers based outside of the US market should refer to our PRO range of BaseGuard products.

Engineered for Everyday Industrial Demands

Engineered for everyday industrial demands, offering versatile 100 viscosity performance with balanced solvency, excellent low-temperature flow, and proven thermal stability, perfect for general-purpose lubrication and process oil needs.

Our PRO range is specifically formulated for markets outside of the US.

The Clear Choice for industrial excellence

Formulated for high-performance industrial use, combines 60 viscosity strength with excellent solvency and dependable low-temperature flow, ideal for sectors where cleaning power, stability, and reliable lubrication are essential.

The Clear Choice when clarity matters

Purpose-built for applications where clarity matters, delivering the ultra-hydrotreated purity of 100 viscosity, superior cold-flow, and thermal resistance. This makes it the ideal solution for professionals who need high-spec performance without compromising standards.

What Are Base Oils?

Base oils are hydrotreated hydrocarbon fluids that form the foundation of many industrial products, including transformer oils, immersion cooling fluids, metalworking fluids, and lubricants. They determine key performance attributes such as viscosity, oxidation stability, solvency, pour point, and thermal resistance.

While base oils can be derived from both petroleum and synthetic sources, naphthenic base oils are unique in offering superior solvency, low-temperature flow, and compatibility across a wide range of applications. High-quality base oils are often hydrotreated to enhance purity, consistency, and oxidative performance.

How Are ClearGuard Base Oils Classified?

Naphthenic base oils are not classified within the API Group I–V system, which was developed primarily for paraffinic and synthetic oils. Instead, they are defined by their hydrocarbon structure specifically, a high proportion of cycloalkanes (naphthenic rings) and by key physical and chemical properties.

These include:

  • Low pour points, making them effective in cold environments.
  • Moderate viscosity index, ensuring consistent flow across a broad temperature range.
  • High solvency, enabling excellent additive compatibility and formulation flexibility.

Naphthenic base oils are typically characterized using ASTM D2140 (carbon type analysis), ASTM D3238, and Viscosity-Gravity Constant (VGC), rather than API groupings. Their unique composition makes them ideal for use in metalworking fluids, mold release agents, dielectric fluids, immersion cooling systems, inks, and specialty industrial lubricants.

  • Group I: Solvent-hydrotreated mineral oils, lower VI and higher sulfur.
  • Group II: Hydroprocessed oils with improved stability and lower sulfur.
  • Group III: Highly hydrotreated, often marketed as synthetic, offering high VI and oxidation resistance.
  • Group IV: Fully synthetic polyalphaolefins (PAOs), known for broad thermal range and chemical stability.
  • Group V: All others including esters, silicones, and bio-based oils used in niche and specialty applications.

Key Properties of Base Oils

When formulating industrial products, the choice of base oil is driven by several critical attributes:

  • Dielectric Strength – High voltage resistance ensures safe operation under stress.
  • Viscosity – Affects flow, film formation, and stability under load.
  • Pour Point – Indicates performance in cold environments.
  • Flash Point – Relates to safety and volatility.
  • Oxidation Stability – Influences product life and thermal resistance.
  • Solvency – Impacts additive compatibility and deposit control.
  • Carbon-Type Composition – Determines how the oil behaves chemically and physically.
  • Neutralisation Number and Moisture Content – Important for electrical or high-purity uses.

ClearGuard’s naphthenic base oils are carefully hydrotreated and quality-controlled to maintain high performance in each of these areas, supporting diverse applications with both standard and high-viscosity options.

Applications of Naphthenic Base Oils

ClearGuard base oils are used as core components in a variety of high-performance products and sectors:

  • Transformer Oil Feedstock – Low sulfur, non-corrosive, and moisture-resistant.
  • Immersion Cooling – Excellent dielectric and thermal conductivity properties.
  • Metalworking Fluids – High solvency and low misting.
  • Mold Release Agents – Consistent film formation and clean release.
  • Grease Manufacturing – Effective thickener compatibility and low pour point.
  • Hydraulic & Circulating Oils – Stable viscosity and oxidative resistance.
  • Printing Inks & Process Oils – Purity and solvency for pigment dispersion and drying control.
  • Environmental Fluids – hydrotreated options supporting ESG and circular economy goals.

How to Choose the Right Base Oil

Selecting the appropriate base oil depends on the demands of the final product and operating environment. Factors to consider include:

  • Viscosity requirements for system pressure, flow, and thermal load.
  • Temperature range — especially pour point and oxidation stability.
  • Solvency and additive compatibility.
  • Regulatory and environmental objectives, including hydrotreated content or biodegradable formulations.
  • Industry-specific performance metrics — such as cleanliness for inks, or non-corrosiveness for transformer oil feedstock.

ClearGuard offers technical guidance and product selection support to help manufacturers match the right Pale 60 or 100-viscosity oil to their exact needs — whether that’s for performance, sustainability, or operational efficiency.

Base Oils: Future Trends and Sustainability

As industries push for greener operations, base oil development is evolving—but not all paths offer equal sustainability or practicality.

  • Biodegradable and synthetic esters are designed to break down quickly in the environment, but they cannot be hydrotreated and typically have limited recyclability. Production costs are also higher, and environmental trade-offs exist due to land use, resource intensity, and degradation requirements.
  • In contrast, mineral-based base oils, such as ClearGuard’s hydrotreated naphthenic oils, are indefinitely recyclable. They retain their molecular integrity, can be hydrotreated multiple times without loss of performance, and support true circular economy models with a lower overall carbon footprint.
  • ClearGuard’s advanced hydrotreated and recovery processes help customers reduce lifecycle emissions, cut waste, and meet sustainability goals, without sacrificing performance, reliability, or affordability.

We also offer tailored base oil solutions for customers seeking performance-aligned, ESG-compliant alternatives that don’t compromise on commercial or environmental outcomes.

Common Misconceptions

Are biodegradable base oils always the most sustainable option?

Not always. While biodegradable oils are designed to break down, they often have a single-use lifecycle and cannot be recycled or reprocessed. Mineral oils, by contrast, can be continuously collected and reused, supporting a true circular economy.

Are mineral base oils outdated compared to synthetics?

Not at all. Modern mineral base oils offer excellent performance, especially in applications where solvency, low-temperature flow, and formulation flexibility are critical. In many cases, they outperform synthetics on cost, availability, and environmental impact if re-cycled effectively.

Do base oils break down in the environment once used?

No. Most mineral and synthetic base oils do not biodegrade naturally and require proper handling or recycling. Only certain biodegradable oils are designed to degrade, but this comes with performance trade-offs and higher production costs.

Are all base oils interchangeable?

No. Naphthenic and paraffinic oils have very different molecular structures and properties. ClearGuard base oils are tailored to specific industrial needs, and blending with other oil types must be done with expert formulation support.

Technical FAQs

What makes ClearGuard base oils suitable for industrial greases?

Our oil’s naphthenic nature, low viscosity, high purity from hydrotreating, and low pour point make it a strong candidate for greases in high-speed, low-temperature, or specialty industrial applications.

Do ClearGuard base oils meet global lubricant blending standards?

Yes. All base oils comply with key ASTM and ISO formulation standards.

Can ClearGuard support custom base oil solutions?

Absolutely. We can provide tailored base oil blends and logistics support aligned with your formulation and operational needs.