Plymouth Gran Fury 1980 Operating Instructions And Product Information page 51

Scheduled Maintenance
Recommended SAE Viscosity Grades
I
J
I
20W-40, 20W-50, 30
10W-30, 10W-40, 10W-50
10W
SW-20 * SW-30, SW-40
J
C F
-20 -10 10
cc
-29 -23 -12
I
32
0
60
16
80
27
100
38
Temperature range anticipated before next oil change.
*SAE 5W-20 Not recommended for sustained hi g h speed
vehicle operation.
Selection of Oil
For best performance and maximum protection of all engines for
all types of operation, only those lubricants should be used
which:
1.
Conform to the requirements of the API Classification "For
Service SE" or "For Service SF" .
2. Have the proper SAE Grade number for the expected tempera-
ture range.
Lubricants which do n ot have both SAE grade number and theSE
or SF service classification shown on the container should not be
used.
It is not necessary to add an y materials to crankcase oils fo r most
types of vehicle operation. In some instances, such as during
break-in after a major engine overhaul and/or new piston installa-
tion, addition of special materials containing anti-scuff additives
are b eneficial. A suitable product for this purpose is Engine Oil
Supplement PIN 3419130 or 4-188.
Low Viscosity Oils
Low viscosity oils make engine starting easier in cold weather.
Oils of the SAE SW-20, SW-30 or SW-40 grade number may be
u sed when minimum temperatures consistently fall below
+
10°F
( - 12°C). For instance, weather records in the Detroit, Michigan
area indicate that more than 10 such days occur during Janu ary
and February on the average. In this case, SAE SW-20, SW-30, or
SW-40 could be used safely and advantageously during these
months. In the Minneapolis, Minnesota area, more than 20 such
days usually occur in the winter months. Here the use of SAE
SW-20, SW-30 or SW-40 oil is highly recommended.
49