Quality specifications
Portugal’s Decree-Law No. Annex III indicates the quality requirements for gasoline, and allows the sale of gasoline grade RON 95 with a maximum ethanol content of 5% v/v and RON 98 at a maximum of 10% v/v.
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.