Fuel; Adding Equipment To The Outside Of; Your Vehicle; Gasoline Octane - Saturn 2007 Ion Owner's Manual

Your vehicle has an airbag system. Before
attempting to do your own service work, see
Servicing Your Airbag-Equipped Vehicle on
page 82.
You should keep a record with all parts receipts
and list the mileage and the date of any service
work you perform. See Maintenance Record
on page 406.

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 retailer before
adding equipment to the outside of your vehicle.
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Fuel

Use of the recommended fuel is an important part
of the proper maintenance of your vehicle.
To help keep the engine clean and maintain
optimum vehicle performance, Saturn recommends
the use of gasoline advertised as TOP TIER
Detergent Gasoline.
The 8th digit of the Vehicle Identification
Number (VIN) shows the code letter or number
that identifies your vehicle's engine. The VIN is at
the top left of the instrument panel. See Vehicle
Identification Number (VIN) on page 374.

Gasoline Octane

If your vehicle has the 2.2L L4 engine (VIN Code F),
use regular unleaded gasoline with a posted octane
rating of 87 or higher. If the octane rating is less
than 87, you may notice an audible knocking noise
when you drive, commonly referred to as spark
knock. If this occurs, use a gasoline rated at
87 octane or higher as soon as possible. If you are
using gasoline rated at 87 octane or higher and you
hear heavy knocking, your engine needs service.