Maintenance And Lubrication - Chevrolet 1965 CORVAIR Owner's Manual

MAINTENANCE AND LUBRICATION
GASOLINE AND ENGINE OIL
In the selection of gasoline and engine oil to be
used, it is best to consider the reputation of the refiner
or marketer. This is the best means of obtaining gasoline
and oil of high quality.
Gasoline
The Corvair Turbo-Air 95 horsepower engine is
designed to operate efficiently on regular grade gas-
olines commonly sold in the United States and Canada .
The higher horsepower performance engines are
designed to operate efficiently on premium grade gas-
olines commonly sold in the United States and Canada .
Use of regular grade gasolines in these higher per-
formance engines may result ,in excessive knocking .
Since the octane quality of all regular grade or of
all premium grade gasolines is not the same and factors
such as altitude, terrain and air temperqture affect oper-
ating efficiency, excessive' knocking may result, even
though you are using the grade of gasoline recom-
mended for your engine. If excessive knocking occurs in
your engine, it may be necessary to use the next higher
grade of gasoline, and if knocking continues, consult
your Authorized Chevrolet Dealer.
If
you plan to operate your Corvair outside the
continental limits of the United States or Canada, there
is a possibility that the best fuels available are so low
32
in octane quality that excessive knocking and serious
engine trouble may result from their use. To minimize this
possibility, write to Chevrolet Motor Division, General
Motors Corporation, Service Operations Department,
Detroit, Michigan 48202 giving: Your engine serial num-
ber (see page 44), the compression ratio of your engine
(see page 44) and the country or countries in which you
plan to travel. You will be furnished details of adjust-
ments or modifications which should be made to your
engine by your Chevrolet dealer prior to your departure.
After arriving in a foreign country, contact the nearest
authorized General Motors dealer for brand names of
the best fuels available and advice as to where they
may be purchased.
In all cases excessive knocking should be avoided
as much as possible in order to prevent possible engine
damage. Operation of your car under conditions of con-
tinuous or excessive knocking constitutes misuse of the
engine for which the Chevrolet Division is not responsible
under the terms of the manufacturer's New Vehicle
Warranty.
ENGINE LUBRICATION
The use of a high quality oil of the correct viscosity
is your best assurance of continued reliability and per-
formancefrom your engine. It is recommended that
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