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MAINTENANCE AND LUBRICATION
OCTANE REQUIREMENTS
The Corvoir six-cylinder engine is designed to deliver
peak performance on what is designated as Regular
grade fuel in the continental United States and Canada.
Regular gasoline may, however, vary in octane between
manufacturers or between
different
sections of the
country_
If
unfavorable performance is encountered be-
cause of either or both of the above factors, ony Author-
ized Chevrolet Dealer can make ignition adjustments
which
will
restore your car to normal operation
.
Operation in Foreign Countries
If you plan to operate your Corvoir 95 or Greenbrier
outside the continental limits of the United States or Can-
ada, there is a possibility that the best fuels available are
so low in octane quality that excessive knocking and
serious engine damage may result from their use. To
minimize this possibility, write to Chevrolet Motor Division,
General Motors Corporation, Service" Technical Depart-
ment
..
Detroit 2, Michigan giving:
• The compression
ratio
of your
engine
(refer to Specifi-
cation Section-Page 38 in this booklet).
• The car identification number (obtain from car registra-
tion or
title).
• The country or countries in which you plan to travel.
You will be furnished details of adjustments or modifi-
cations which should be made to your engine, by your
24
Chevrolet dealer prior to your departure. Failure to
make the necessary changes to your cor and subsequent
operation under conditions of continuous or excessive
knocking, constitutes misuse of the engine for which the
Chevrolet Division is not responsible under the terms of
the Warranty.
After arriving in a foreign country, contact the near-
est authorized General Motors dealer for brand names
of the best fuels available and" advice as to where they
may be purchased.
ENGINE LUBRICATION
LOWEST
RECOMMENDED SAE VISCOSITY OIL
ANTICIPATED
TEMP.
SI NGLE VISCOSITY MULTI-VISCOSITY
32'
F_
SAE-30
SAE-l0W-30
_10
0
F.
SAE-l0W
SAE-l0W-30
Below _10
0
F.
SAE-5W
SAE-5W-20
After the first 1,000 miles of driving, if average day-
time temperature is below 60° during the break-in
period, the original heavy duty break-in oil should be
drained from the engine and the crankcase refilled with
oil as shown in the accompanying
table.
If
average daytime temperature
is
above 60°F. dur-
ing the break-in period, change initial break-in oil to
SAE-30 or SAE-l0W-30 oil after the first 500 miles of
operation.
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