Ethanol blends
Portugal’s Decree-Law No. Annex III indicates the quality requirements for gasoline, and allows the sale of gasoline grade RON 95 with ethanol content at 5% v/v maximum and RON 98 at 10% v/v maximum.
The national standardization body has approved a standard, NP EN 15293:2018, which allows up to 85% v/v ethanol blending in gasoline.
For more details about the specifications of the standards, please see the SGS INSPIRE fuel quality database.