Owner`s manual

If any undesirable driveability problems such
as engine stalling and hard hot starting are
experienced after using oxygenate-blend fuels,
immediately change to a non-oxygenate fuel
or a fuel with a low blend of MTBE.
Takecarenot to spillgasolineduring re-
fueling. Gasoline containing oxygen-
ates can cause paint damage.
Aftermarket fuel additives
INFINITI does not recommend the use of any
fuel additives (i.e. fuel injector cleaner, octane
booster, intake valve deposit removers, etc.)
which are sold commercially. Many of these
additives intended for gum, varnish or deposit
removal may contain active solvent or similar
ingredients that can be harmful to the fuel
system and engine.
Octane rating tips
In most parts of North America, you should
use unleaded gasoline with an octane rating of
at least 91 AKI (Anti-Knock Index) number.
However, you may use unleaded gasoline with
an octane rating as low as 85 AKI (Anti-Knock
Index) number in these high altitude areas
[over 4,000 ft (1,219 m)] such as: Colorado,
Montana, New Mexico, Utah, Wyoming,
northeastern Nevada, southern Idaho, western
South Dakota, western Nebraska, and that part
of Texas which is directly south of New
Mexico.
Using unleaded gasoline with an octane
rating lower than stated above can
cause persistent, heavy “spark knock”.
(“Spark knock” is a metallic rapping
noise.)Ifsevere,thiscanleadtoengine
damage.If youdetecta persistentheavy
spark knock even when using gasoline
ofthestated octanerating,or ifyouhear
steady spark knock while holding a
steady speed on level roads, have your
dealer correct the condition. Failure to
correctthe conditionismisuseoftheve-
hicle, for which INFINITI is not respon-
sible.
Incorrect ignition timing will result in knock-
ing, after-run or overheating. This in turn may
cause excessive fuel consumption or damage
to the engine. If any of the above symptoms
are encountered, have your vehicle checked at
an INFINITI retailer or other competent service
facility.
However, now and then you may notice
light spark knock for a short time while
accelerating or driving up hills. This is
no cause for concern, because you get
the greatest fuel benefit when there is
light spark knock for a short time under
heavy engine load.
TECHNICAL AND CONSUMER INFORMATION
10-4
Z 02.2.7/JR50-D X