- All retail locations within the licensed country must meet the high standards of the TOP TIER™ program.
- All gasoline grades must be treated with an approved TOP TIER™ Detergent Gasoline additive at the correct concentration.
- The TOP TIER™ logo must be prominently displayed.
- TOP TIER™ licensed retailers agree to not use organometallic additives (such as MMT or Ferrocine).
- Find more information here.