1/2 quart
Car oil
30 hd oil
10w30 will do.
One 20 Oz bottle is the capacity.
A 17.5 horsepower Murray riding lawnmower should always have 1.5 quarts of oil in it. You may have to add more than that after an oil change because some of the oil will go down into the oil filter.
30W for summer
SAE 30W
30 sae
That would depend entirely on the particular Toro mower you're referring to.
Find a drain plug or turn it on it side and dump the oil out.
Straight 30 weight