Friday, Jul 24, 2026 The claims desk. Receipts included. POWERED BY LENZ ↗
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SCIENCE

The Claim

Under ASTM D924 test conditions, the dielectric dissipation factor (power factor) of an in-service (aged) sample of Nynas Nytro 10XN transformer mineral oil at 70°C is greater than 0.01.

Verified by Lenz ·

The Short Version

The claim is not supported by the available evidence. Reliable sources for NYTRO 10XN provide new-oil ASTM D924 values far below 0.01, while broader industry references only show that some badly degraded mineral oils can exceed 0.01 under certain conditions. That does not establish that an aged, in-service NYTRO 10XN sample at 70°C will be greater than 0.01.

Caveats

  • No cited source provides a product-specific ASTM D924 measurement for aged or in-service NYTRO 10XN at 70°C.
  • The claim treats a possible outcome for severely degraded mineral oils as a definite property of this named oil.
  • A power factor above 0.01 is generally an abnormal or unsatisfactory condition, not something implied by the phrase “in-service (aged)” alone.

The Receipts

  1. NYTRO® 10XN – Product data sheet (English)

    Nynas AB

  2. Astm D924 08 | PDF | Capacitor | Dielectric

    Scribd (ASTM reprint)

  3. Transformer Liquid Power Factor in Mineral Oil - Part 1

    SDMyers

  4. Dielectric Dissipation Factor as a Diagnostic Tool for Insulating Oil Degradation in Transformers

    TNB Labs

  5. Testing guidelines for ester oils in transformers – part 2

    WearCheck

  6. Nytro 10XN | IEC 60296 | Maximum Performance Insulating Oil

    Finol Oils

  7. Nytro 10XN – Product Data Sheet

    InTyler Fimaco (Nynas distributor)

  8. Transformer Oil Analysis And Fluid Testing

    RESA Power

  9. ASTM D924 - Standard Test Method of Dissipation Factor (or Power Factor) and Relative Permittivity (Dielectric Constant) of Electrical Insulating Liquids

    Savant Labs

  10. Understanding transformer oil dielectric loss factor

    CIGRÉ tutorial reprint

+ 7 more sources — see the full list on Lenz

Filed Under

ASTM D924Nynas Nytro 10XN