It depends on the mower. Some use 30 weight. Some use 10w30.
10w30 will do.
SAE 10w30 100% synthetic.
No, it is far to heavy. Use only SAE 10w30 or SAE 30.
Use 30w synthetic or 10w30 synthetic. 30w is preferred.
SAE 10w30 full synthetic.
10w30 or 10w40 seem to work well.
SAE 10w30 any major brand. I recommend you use a 100% synthetic oil.
If you raise the hood of the mower up it should have it on the yellow detailed sticker of mower. Normally 10w30
Preferably a Synthetic oil in a 10w30 or 0w30 weight. If you cannot afford the 9 dollars per season, you can use conventional dinosaur oil in a 10w30 weight.
SAE 30 or 10W30 full synthetic any major brand.
Yes, that is an optional oil weight that you can use. However if you are only using the mower in warm weather then SAE 30 weight is a better choice. I recommend you use Synthetic oil in an air cooled engine.