Honda GX120 Owner's Manual page 31

SERVICING YOUR ENGINE
ENGINE OIL RECOMMENDATIONS
Oil is a major factor affecting performance and service life. Use
4-stroke automotive detergent oil.
SAE IOW-30 is recommended for general use. Other viscosities shown
in the chart may be used when the average temperature in your area is
within the recommended range.
I
I I
I 1 I I
I
-30 -20 -10 0
10 20 30
40'C
AMBIENT TEMPERATURE
The SAE oil viscosity and service classification are in the API label on
the oil container. Honda recommends that you use API SERVICE
category SJ oil.
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