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Lubrizol is a specialty chemical powerhouse, widely respected in the refrigeration industry as the parent company behind the CPI Fluid Engineering brand. They are the chemical architects behind many of the world's most advanced synthetic polyol ester (POE) and polyalkylene glycol (PAG) fluids, developing base stocks that provide superior miscibility and thermal stability for modern refrigerants like COâ‚‚ and ammonia.

Stellar leverages Lubrizol’s technology (often through the CPI brand) to supply the most chemically advanced fluids for the systems they engineer. By sourcing these high-performance synthetic lubricants, Stellar ensures that their clients' compressors are protected against wear and varnish even under high-stress conditions, while optimizing oil return and heat transfer efficiency throughout the refrigeration loop.