NORMALLY ASPIRATED ENGINES

NORMALLY ASPIRATED ENGINES

Temperatures ranging from −20°to 60°F (-29°to 16°C): SAE 5W–20, 5W–30, 5W–40
Temperatures ranging from −10°to 120°F (-23°to 49°C): SAE 10W–30, 10W–40, 10W–50
Temperatures ranging from 32°to 120°F (0°to 49°C): SAE 20W–20, 20W–40, 20W–50

NOTE: 5W–20 is not recommended for sustained high speed operation regardless of the weather.

Fig. 1: Oil viscosity standards for both normally aspirated and turbocharged (diesel) engines. Adherence to these standards helps insure long engine life, easier starting and economical operation in cold weather