Use Mobil 1 or equivalent.
not a good idea 0w20 is very thin oil. unless your engine calls for it it will go right through your piston ring & burn the oil. 10w 30 is a much thicker weight.
Just use what Toyota recommends unless you live in a extremely cold place,then I'd go 0w20 because it flows better in the cold.
0w30
Yes. SAE 0W20 means that the oil has zero viscosity in winter. This oil does not exist, which is just as well because if it did it would drain right down into the sump leaving the engine unlubricated. Several companies make a SAE 0w20, including AMSOIL and Toyota. In cold temperatures the oil is thicker than at warm temperatures. Because it has a lower viscosity, it lubricates the engine faster than a higher viscosity oil. Toyota is specifying 0w20 next year.
Use only what Honda recommends which is SAE 0w20 Any major brand.
No you can't use a golf cart mower on a lawn mower. You have to find a muffler that matches the make and model of the lawn mower.
It depends on the mower. Some use 30 weight. Some use 10w30.
20w50? That's some thick stuff. Are you sure you don't need 5w30, 5w20, 0w20 or 0w40?
Mower engines use 30Wt
FWIW, my Honda dealer here in Mpls told me the Honda brand 0W20 oil is SEMI-synthetic and NOT full synthetic. That seems logical to me because they charge $39 for a 0W20 oil change and to get full synthetic almost anywhere it cost you around $60 for an oil change. Full synthetic Mobil 1 0W20 cost $6.50 a quart at Walmart, so you are already over $33 just for the oil. Add labor and a good filter and your at the $60 mark.
Synthetic 0W20