Use any JASO-MA or MA2 oil of grade 15-40 W preferably.
20w50 motorcycle oil, any brand.
5wt oil. Use Honda oil.
Honda recommends SAE 10W40 in a GN4 or HP4 classification for 4 stroke applications.
The bottom of the oil pan.
If you mean a different weight then you're not very wise. Use the exact weight oil that Honda recommends. If you are referring to the brand of oil, you do not have to use Honda oil. In fact Honda does not even make oil their oil is refined by another company. You can use any major brand oil of your choice, as long as it is the correct weight.
The type of oil that is recommend for a 1989 Honda Accord is 10 W 30. However, if the car is used in colder weather states, 5 W 30 can be used.
A Honda CT110 will take 0.9 liters of oil
The recommended oil type for a 1989 Honda Xr200R is 20 W 50. This oil can be purchased at any cycle shop or auto parts store.
3.7 qt
probably 5w-30
About 2.5 quarts of oil
The oil capacity is 3.7 QTS