1.1 Minimum Octane and AKI Ratings for Gasoline Engines
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Up to 2005 model year
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* | 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* | at least 93.0 | at least 90.0 | at least 87.0 |