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Castrol Validates ON PG25 and PG25T Coolants for NVIDIA's AI Infrastructure

On August 18, 2026, Castrol made a significant announcement regarding its innovative liquid cooling solutions. The company has successfully validated two of its direct chip cooling fluids, Castrol ON PG25 and PG25T, to meet NVIDIA's stringent requirements for AI data centers and factories. This notable achievement reinforces Castrol's position as a leader in liquid cooling technology, particularly as artificial intelligence continues to drive the need for advanced, high-performance data center infrastructures.

The Need for Advanced Cooling Solutions

As data centers become increasingly powerful and compact to accommodate demanding AI applications, the heat generated poses a considerable challenge. Traditional air-cooling methods often fall short when dealing with high computational loads, necessitating innovative approaches to thermal management. Direct chip cooling technologies, such as those developed by Castrol, provide a solution by circulating coolant through cold plates attached to critical components like CPUs and GPUs. This method ensures optimal thermal regulation, effectively dissipating heat that air cooling cannot manage.

Castrol ON PG25 is specifically engineered for these environments, contributing to a comprehensive range of direct chip cooling fluids that cater to modern technological needs. As a closed-loop system, the fluid not only minimizes atmospheric exposure but also reduces water evaporation loss, thus enhancing the water use efficiency (WUE) of AI factory infrastructures.

Comprehensive Validation Process

The validation of Castrol’s cooling fluids involved an extensive technical review focusing on numerous performance metrics. The assessment included:

• - Corrosion Resistance: Ensuring long-term stability and safety of the components.
• - Thermal Stability: Maintaining performance at elevated temperatures.
• - Dilution Water Quality: Guaranteeing the integrity and purity of the cooling system.
• - Fluid Compatibility: Verifying the fluid's interaction with metals, plastics, seals, and other components in contact with the liquid.

Additionally, the evaluation examined the resilience of Castrol's business practices and its global supply chain capabilities, further confirming the company’s reliability.

Peter Huang, the Global President of Thermal Management and Data Centers at Castrol, emphasized the importance of these validations: “As AI infrastructure continues to expand, the industry requires cooling solutions that are effective, practical to implement, and reliable over time. The inclusion of Castrol ON PG25 and PG25T in NVIDIA-validated AI factory infrastructure provides our customers with confidence in both fluid performance and Castrol's ability to deliver consistent global support across markets.”

Industry Implications

The validation of these fluids is a crucial step toward integrating liquid cooling as a dependable element in the design and operation of AI manufacturing plants. Sung A. Kim, Global Data Center Technology Manager at Castrol, highlighted the rigorous conditions under which each thermal management fluid is tested before market release. The NVIDIA validation supports that PG25 (Organic Acid Technology) and PG25T (Inorganic Acid Technology) meet the demanding standards necessary for the current AI infrastructure.

About Castrol

With over 125 years of expertise, Castrol is a leading global lubricants brand known for its commitment to innovation and high-performance products. Part of the bp group, Castrol serves customers in various sectors, including automotive, marine, industrial, and energy. Their dedication to quality and cutting-edge technology is recognized worldwide, cementing their role in numerous groundbreaking technological achievements across land, sea, air, and space.

For more information about Castrol and its cooling solutions, visit www.castrol.com.

The Future of Cooling

As the demands for high-performance cooling solutions grow alongside advancements in AI and data processing, Castrol continues to develop cutting-edge fluids for data centers and energy storage systems. Aiming to support the needs of AI workloads, machine learning, and cloud computing, Castrol ON is committed to providing efficient thermal management throughout the lifecycle of a data center, ensuring sustainability and performance optimization.