Hyundai HG4050 User Manual page 26

Effective Viscosity Range of Engine Oils
5W-30
-30 -20
-20 0
NOTE
Do not tilt the generator when adding engine oil. This could result in
overfilling and damage to the engine.
Using non-detergent or 2-stroke oil could shorten the engine's working
life.
Use high quality engine oil with strong detergents.
Handle and store the engine oil with care, avoid getting dirt or dust into
the engine oil.
Do not mix different engine oils.
Before the engine oil falls below the safety margin, the low oil alert
system will automatically shut off the engine. The low oil light will turn
on.
To avoid the inconvenience of unexpected engine shutoff, check the
engine oil level as often as possible.
Use 4-stroke engine oil, certified to meet or exceed API standard SG,
SF, SAE ratings.
Synthetic 5W-30
10W-30
0°C
-10 10
32°F
20 40
19
15W-50
20 30
60 80 100
40 50 °C
120 °F