Use exactly what Honda recommends and nothing else which is SAE 10w30 for general use. Using anything else may void your 7 year warranty. I recommend you use synthetic oil in any air cooled engine.
SAE30
sae30
SAE30
Almost 1qt, they usually take SAE30 wt oil as well.
If it is a Briggs engine it takes SAE30. If it is a Kohler engine it takes 10W-30.
If it has a Briggs and Stratton engine you need SAE30. If it is a Kohler it uses 10W30.
Briggs and stratton engines use different oils depending on the temperature to which the engines will be used. Generally sae30 oil should be used for mower engines
Check the owners manual on the web for your product, for example the F200 series specifies the same oil as the engine SAE30
If it is a 4-cycle engine you definitely need motor oil. If its a 2-cycle engine then the oil is mixed with the gas. If its a reel mower then no oil is needed except for external lubrication. Depending on the engine manufacturer the 4-cycle engines will require either SAE30 or 10w30 motor oil.
.55 liters OR .58 quarts (according to Honda website)
0.55 Litres
Find a drain plug or turn it on it side and dump the oil out.