Cooling fluids validated by NVIDIA
Castrol announced today that two of its direct-to-chip cooling fluids - Castrol ON PG25 and PG25T- have been validated to meet NVIDIA’s requirements for AI factory and data centre infrastructure.
Castrol ON PG25 cooling fluids validated for NVIDIA AI factory and data centre infrastructure
Pangbourne, 18th August 2026
Castrol announced today that two of its direct-to-chip cooling fluids - Castrol ON PG25 and PG25T-have been validated to meet NVIDIA’s requirements for AI factory and data centre infrastructure. This validation gives data centre operators, equipment manufacturers and cooling- system providers additional confidence when selecting fluids for high-performance AI infrastructure.
AI and high-performance computing are packing more processing power into data centres, generating high heat levels that can be difficult to manage with air cooling alone. Direct-to-chip cooling addresses this by circulating fluid through cold plates fitted to components such as Central Processing Units and Graphics Processing Units. Castrol ON PG25 is designed for these environments and forms part of Castrol’s wider portfolio of direct-to-chip cooling fluids. As a closed-loop system, the fluid circulates continuously without atmospheric exposure, minimizing evaporative water loss and improving the water usage effectiveness (WUE) of AI factory infrastructure.
Castrol ON PG25 and PG25T were validated following a technical review covering corrosion resistance, thermal stability, dilution-water quality, propylene glycol base-fluid purity and compatibility with wetted materials — the metals, plastics, seals and other components that come into contact with fluid inside a liquid-cooling system. The wider review also considered Castrol’s business and global supply-chain resilience.
About Castrol
Castrol, one of the world’s leading lubricant brands, has a proud heritage of innovation and fuelling the dreams of pioneers. Our passion for performance, combined with a philosophy of working in partnership, has enabled Castrol to develop lubricants and greases that have been at the heart of numerous technological feats on land, air, sea, and space for over 125 years. Castrol is part of the bp group and serves customers and consumers in the automotive, marine, industrial and energy sectors. Our branded products are recognized globally for innovation and high performance through our commitment to premium quality and cutting-edgetechnology. For more information, please visit: www.castrol.com
About Castrol Thermal Management
Castrol's thermal management business develops fluids for data centres and energy storage systems under the Castrol ON brand. We serve markets in the US, Europe, the Middle East, China, Australia and Southeast Asia.
Castrol ON offers data centre cooling fluids for AI, machine learning, and cloud computing workloads, which can support thermal management across the lifecycle
of a data centre.
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