BMW Z4 ROADSTER Owner's Manual page 301

NOTICE
Fuel that does not comply with the minimum
quality can compromise engine function or
cause engine damage. There is a risk of
damage to property. Do not fill with fuel that
does not comply with the minimum quality.
NOTICE
Incorrect fuels can damage the fuel system
and the engine. There is a risk of damage
to property. Do not use fuels with a higher
ethanol content than recommended. Do not
refuel with fuels containing methanol, e.g. M5
to M100.
Recommended gas quality
BMW recommends AKI 91.
M Performance model:
BMW recommends AKI 93.
Minimum fuel grade
BMW recommends AKI 87.
If you use gasoline with this minimum AKI Rat-
ing, the engine may produce knocking sounds
when starting at high external temperatures.
This has no effect on the engine life.
Online Edition for Part no. 01405A88B63 - VI/23
Operating materials
Engine oil
General information
The engine oil consumption is dependent on
your driving style and driving conditions.
Therefore, regularly check the engine oil level
after refueling by taking a detailed measure-
ment.
The engine oil consumption can increase in
the following situations, for instance:
▷ Sporty driving style.
▷ Break-in of the engine.
▷ Idle operation of the engine.
▷ With use of engine oil types that are not
recommended.
Different Check Control messages appear on
the control display depending on the engine oil
level.
The vehicle manufacturer recommends having
the engine oil changed by an authorized serv-
ice center or another qualified service center
or repair shop. The suitable viscosity grade is
indicated on a sign in the engine compartment.
Safety information
NOTICE
An engine oil level that is too low causes en-
gine damage. There is a risk of damage to
property. Immediately add engine oil.
NOTICE
Too much engine oil can damage the engine
or the catalytic converter. There is a risk of
damage to property. Do not add too much
engine oil. If there is excess engine oil, have
the engine oil level corrected by an author-
ized service center or another qualified serv-
ice center or repair shop.
MOBILITY
301
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