Crankcase

Diesel engines CC, CD‡
Gasoline engines SF
Turbo Diesel engines CD
‡Preferred

All engines:
1981-87
68° to 104°F (20° to 40°C) 40
32° to 86°F (0° to 30°C) 30
14° to 86°F (-10° to 30°C) 20W-40, 20W-50
14° to 50°F (-10° to 10°C) 20W-20
5° to 86°F (-15° to 30°C) 15W-40, 15W-50
-4° to 50°F (-20° to 10°C) 10W-30,10W-40*
Gasoline engines:
-22° to 14°F (-30° to 10°C) 5W-20
*10W-40 not recommended for 1986-87 models
1988
Above 68°F(20°C) 40
32° to 86°F (0° to 30°C) 30
Above 14°F (-10°C) 20W-40, 20W-50
14° to 50°F (-10° to 10°C) 20W-20
Below 25°F (-4°C) 10W
Above 5°F (-15°C) 15W-40, 15W-50
0° to 60°F (-18° to 16°C) 10W-30, 10W-40
Below 14°F (-10°C) .5W-20, 5W-30