Chevrolet 1971 Camaro Owner's Manual page 45

under the proper conditions, they react with other
gases to form photochemical smog, which is so prev-
alent in Los Angeles.
In addition, carbon monoxide emissions have been
reduced by about 65 percent compared with 1960
model cars without controls. Although carbon mon-
oxide does not enter into the complex photochemical
smog reaction, it is toxic at high concentrations and
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 Camaro
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
42
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
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 information
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.