What are the differences between dry type power transformers and oil filled transformers in terms of transformer oil usage?

The differences between dry type power transformers and oil filled transformers in terms of transformer oil usage are significant. Oil filled transformers utilize transformer oil for insulation and cooling, which enhances their thermal performance and electrical insulation properties. In contrast, dry type power transformers do not use transformer oil; they rely on air or solid insulation materials, making them less suitable for high-voltage applications where cooling and insulation are critical.