BMW z4 2005 Manual Do Utilizador

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Minimum Octane Rating corresponds to the 
Anti Knock Index AKI and is determined by the 
so-called (R+M)/2 method.
Do not use leaded gasoline, as otherwise 
the lambda probe and catalytic converter 
will be permanently damaged.
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Use high-quality brands
Field experience has indicated significant dif-
ferences in fuel quality: volatility, composition, 
additives, etc., among gasolines offered for sale 
in the United States and Canada. Fuels contain-
ing up to and including 10% ethanol or other 
oxygenates with up to 2.8% oxygen by weight, 
that is, 15% MTBE or 3% methanol plus an 
equivalent amount of co-solvent, will not void 
the applicable warranties with respect to 
defects in materials or workmanship.
The use of poor-quality fuels may result in 
drivability, starting and stalling problems 
especially under certain environmental condi-
tions such as high ambient temperature and 
high altitude.
Should you encounter drivability problems 
which you suspect could be related to the fuel 
you are using, we recommend that you respond 
by switching to a recognized high-quality 
brand.
Failure to comply with these recommendations 
may also result in unscheduled maintenance.
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