Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1.1 Minimum Octane and AKI Ratings for Gasoline Engines
2011 BMW X3 28iSECTION 1.1 Minimum Octane and AKI Ratings for Gasoline Engines
Up to 2005 model year
MINIMUM OCTANE AND AKI RATINGS FOR GASOLINE ENGINES REFERENCE CHART
| 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 |
MINIMUM OCTANE AND AKI RATINGS FOR GASOLINE ENGINES REFERENCE CHART
| 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, see (1) | at least 93.0 | at least 90.0 | at least 87.0 | ||
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RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.