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thus, has been controlled to prevent high atmospheric
concentrations.
Recent Developments
Another important advancement in air pollution
control has been the removal of lead from gasoline.
(Certain lead compounds have been used for many
years as additives to increase octane ratings.) All
1971 General Motors cars including your Monte
Carlo are designed to operate on unleaded or low-lead
(zero to 0.5 grams per gallon) gasolines. However,
any gasoline with 91 Research Octane Number or
higher will satisfy your engine's octane requirements.
Use of unleaded or low-lead gasoline will keep your
engine running efficiently and play an important
part in reducing exhaust emissions of hydrocarbons
and particulates.
Your Role in Controlling Air Pollution
1. Use Unleaded or Low-Lead Fuels-To obtain
47
maximum results in the reduction of automotive
emissions, use an unleaded gasoline. If such gaso-
line is not available, you may use a leaded regu-
lar grade gasoline.
2.
Have The Air Pollution Control Systems on Your
Car Serviced Regularly-The following pages of
this
section
describe the emission control systems
on Chevrolet
vehicles
and provide
inf~rmation
on their proper maintenance. By following these
recommended maintenance services you will help
assure cleaner air and provide a better
running,
longer lasting engine and greater all around satis-
faction, economy and performance.
NOTE: For your convenience, all of the recom-
mended services for air pollution control systems dis-
cussed on the following pages are summarized by
time and mileage intervals in the
"Maintenance
Schedule" Section of this manual.
I
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