Yes you can.
If the recommended oil is SAE30 why would you use SAE 10W30? Some mowers recommend either of these weights but if your recommends 30W then using 10W30 will cause it to use oil.
SAE 10w30 is better for lower temp and SAE 20w40 is the opposite better hotter temps.Thanks
SAE 10W30 or yamalube 10w30
SAE 10W30
SAE 10w30 oil.
SAE 10w30
SAE 10w30
10w30
SAE 10w30
SAE 10w30
SAE 10w30
SAE 10w30