1.1 Minimum Octane and AKI Ratings for Gasoline Engines
MINIMUM OCTANE AND AKI RATINGS FOR GASOLINE ENGINES
| Leaded Gasoline | |||||
|---|---|---|---|---|---|
| Premium Grade | Regular Grade | ||||
| RON (Research Octane No.) | at least 91.0 | ||||
| MON (Motor Octane No.) | at least 82.7 | ||||
| AKI (1) | at least 93.0 | at least 87.0 | |||
| Unleaded Gasoline | |||||
| Premium Grade | Mid-Range | Grade Regular Grade | |||
| RON | at least 98.0 | at least 95.0 | at least 91.0 | ||
| MON | at least 88.0 | at least 85.0 | at least 82.5 | ||
| AKI (1) | at least 93.0 | at least 90.0 | at least 87.0 | ||
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