Legislation is in place in some countries to dye fuels for identification purposes.

Dyes can be used so that different grades of fuel can be easily visually identified both on the refinery and by consumers at the petrol pumps. Dyes are used to identify leaded, unleaded and leaded replacement fuels or different octane level gasoline in countries such as South Africa, Japan Thailand and Australia.

• Oil companies can use dyes to market and differentiate premium grades of fuel
• Easy identification of fuels for customers at petrol station - for example - to differentiate different octane levels
• Safe visual identification at refinery