Pontiac 2005 Vibe - Manual (Page 227)

Adding Equipment to the Outside
of Your Vehicle
Things you might add to the outside of your vehicle
can affect the airflow around it. This may cause
wind noise and affect windshield washer performance.
Check with your dealer before adding equipment to
the outside of your vehicle.
Fuel
The 8th digit of your vehicle identification number (VIN)
shows the code letter or number that identifies your
engine. You will find the VIN at the top left of the
instrument panel. See Vehicle Identification Number
(VIN) on page 5-95.
Gasoline Octane
If your vehicle has the 1.8L L4 (VIN Code 8) engine,
use regular unleaded gasoline with a posted octane of
87 or higher. If the octane is less than 87, you may
get a heavy knocking noise when you drive. If this
occurs, use a gasoline rated at 87 octane or higher as
soon as possible. Otherwise, you might damage
your engine. A little pinging noise when you accelerate
or drive uphill is considered normal. This does not
indicate a problem exists or that a higher-octane fuel is
necessary. If you are using 87 octane or higher-octane
fuel and you hear heavy knocking, your engine
needs service.
If your vehicle has the 1.8L L4 (VIN Code L) engine,
use only premium unleaded gasoline with a posted
octane of 91 or higher. In an emergency, you may be
able to use a lower octane — as low a 87 — if heavy
knocking does not occur. Refill your tank with premium
fuel as soon as possible. Otherwise, you might
damage your engine. If you are using 91 octane or
higher-octane fuel and you hear heavy knocking,
your engine needs service.
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