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Transformer Oils

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Premium transformer oils for utilities and contractors that support dielectric strength, operational safety, and long asset life with expert support.

We distribute virgin transformer oils that meet stringent international and Australian standards, in flexible volumes and with expert advice. Each delivery ensures reliability, compliance, and performance so operators can run critical infrastructure with confidence.

Transformer oil is the lifeblood of oil-filled electrical equipment, serving as both an insulator and coolant. Benzoil offers premium transformer oil in multiple grades including virgin, re-refined, and regenerated, all designed to meet international and Australian standards. Every supply is PCB-free and accompanied by a NATA- accredited certificate of analysis for complete assurance.

To meet the needs of both large-scale utilities and smaller operators, we supply oil in 20L containers, 205L drums, and 1,000L IBCs. We also offer specialist flush oil for cleaning internal components and enabling safe retrofilling during maintenance or refurbishment. Whether you are replacing oil in remote infrastructure or topping-up critical systems, Benzoil delivers proven expertise, reliable logistics, and high-quality products you can trust.

Transformer Oils:
Your questions answered

What is the difference between mineral oil, natural esters, synthetic esters, and silicone fluids?
Mineral oils are widely used and cost-effective. Esters and silicone fluids provide environmental, safety, or high-temperature benefits for specific applications. Benzoil supplies all grades with guidance on application, fire safety, and compliance.
What are K-class fluids, and when should they be used?
K-class fluids have fire points above 300°C, including natural and synthetic esters, as well as silicone fluids. They are recommended where insurers or standards require less-flammable insulating liquids or where high fire safety is critical.
Is any transformer oil produced in Australia?
No. Transformer oil is manufactured overseas by major refiners and specialty producers. Supply chains draw on naphthenic crude and other feedstocks from regions including the Middle East, North America, and Asia. Benzoil manages a compliant, reliable local supply.

Why Benzoil

We coordinate national supply through trusted partners—ensuring compliance, consistency, and continuity of supply. Every order is matched to performance criteria, regulatory needs, and logistical constraints.

Whether you’re planning ahead or dealing with a critical shortage, we respond fast and supply smart.

About our model

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Benzoil delivers solutions across three critical stages of the hydrocarbon lifecycle—supply, recovery, and reuse.

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