BMW X3 3.0i SAV 2004 - Manual (Page 87)

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Driving tips
Mobility
85
Never attempt to continue driving
until the tank is completely empty, as
engine functions could be affected, and the
vehicle could sustain damage as a result.
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Fuel specifications
The engine uses lead-free gasoline only.
Required fuel:
Premium Unleaded Gasoline,
minimum 91 AKI
AKI = Anti Knock Index.
Do not use leaded fuels. The use of
leaded fuels will cause permanent
damage to the system's oxygen sensor and
the catalytic converter.
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