Pontiac Sunbird Owner's Manual page 194

In addition, some gasoline suppliers are
now producing reformulated gasolines.
These gasolines are specially designed
to reduce vehicle emissions. General
Motors recommends that you use
reformulated gasoline. By doing so, you
can help clean the air, especially in
those parts of the country that have high
ozone levels.
You should ask your service station
operators if their gasolines contain
detergents and oxygenates, and if they
have been reformulated to reduce
vehicle emissions.
Fuels in Foreign Countries
If you plan on driving in another
country outside the U.S. or Canada,
unleaded fuel may be hard to find.
Do not use leaded gasoline. If you use
even one tankful, your emission controls
won't work well or at all. With
continuous use, spark plugs can get
fouled, the exhaust system can corrode,
and your engine oil can deteriorate
quickly. Your vehicle's oxygen sensor
will be damaged. All of that means
costly repairs that wouldn't be covered
by your warranty.
To check on fuel availability, ask an auto
club, or contact a major oil company
that does business in the country where
you'll be driving.
You can also write us at the following
address for advice. Just tell us where
you're going and give your Vehicle
Identification Number (VIN)
.
General Motors of Canada
Ltd.
International Export Sales
P.O. Box 828
Oshawa, Ontario LEI 7N1, Canada
1 9 3
8 8 8