Shell Products

Shell Diala S2 ZX-A


Shell Diala S2 ZX-A is a fluid designed to protect your valuable equipment. Widely recognised and approved by leading manufacturers, it is noncorrosive to copper and does not require a copper passivator, as proved in the latest and most severe copper corrosion tests. Manufactured from highly refined mineral oils, it resists oil degradation by oxidation and has good low-temperature properties, which are vital for efficient heat transfer inside the transformer, even at low temperatures.


Designed to protect

Protecting components from damage can help to increase service life and maximise your return on investment in equipment. Shell Diala S2 ZX-A provides continuing transformer protection in service. In the industry-standard test, it typically produces

  • less than 25% of the maximum specified limit for sludge.

Designed for long oil life

Inhibited oils such as Shell Diala S2 ZX-A contain small amounts of additives to inhibit oxidation and thus prolong oil life. It offers

  • high oxidative stability for long oil life in service.

Designed for HIGH efficiency

Shell Diala S2 ZX-A is designed to help maximise efficiency by helping equipment to meet or exceed its design capabilities. Compared with the industry minimum requirements, it offers

  • good low-temperature viscosity, which provides optimised heat transfer at low temperatures.

Specifications and approvals

Shell Diala S2 ZX-A meets the requirements of key industry bodies and equipment manufacturers.

Real-world value delivery

Shell Diala S2 ZX-A is one of the latest inhibited electrical insulating oils from Shell. It has been designed to offer reliable performance and effective protection for transformers throughout their operating lives.


Whatever your needs or application, we can provide a full range of oils and greases, including synthetic, high-performance products and additional services.