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GMC 2003 Envoy XL - Fuel; Gasoline Octane; Gasoline Specifications

GMC 2003 Envoy XL
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Fuel
Gasoline Specifications
Use of the recommended fuel is an important part of the
It
is recommended that gasoline meet specifications
proper maintenance of your vehicle.
which were developed by the American Automobile
Manufacturers Association and endorsed by the
Canadian Vehicle Manufacturers Association for better
vehicle performance and engine protection. Gasoline
meeting these specifications could provide improved
driveability and emission control system performance
compared
to
other gasoline.
Gasoline Octane
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 hear heavy knocking, your engine needs
service.
Canada
Only
In Canada, look for the
"Auto Makers' Choice"
label on the pump.
5-5

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