Please check your mower's operator manual for which oil that is recommended for that specific engine. You can find your models manual on Husqvarna's homepage under Support
Different oil types work best at certain temperatures. See below recommended temperature ranges:
Husqvarna SAE-30 is a good standard oil for your petrol-powered lawn mower.
If you are using your lawn mower in especially cold or warm climate, you may benefit from using a different oil.
Note: Below 4°C (40°F) the use of SAE 30 will result in hard starting.
If SAE-30 oil is used at temperatures lover than +5° there is a risk that it does not lubricate the engine sufficiently. This may cause engine damage.
Above 27°C (80°F) the use of 10W30 may cause increased oil consumption. Check oil level more frequently.
Check oil level more often when using low viscosity oil.
Use engine oil of quality SF, SG, SH, SJ or higher.