brother let me tell you honda maintenance for your car (city 2009):-
1: you must use 5w30 oil. do not use any other oil. oil maintenance interval is 5000km or 6 months whichever comes first.
2: change ur air filtet after 10K or 1 year ,whichever comes first.changing air filter with oil change is not required.u r wasting ur money.
now to ur oil consumption question ! if your oil oil level does not fall below the "MIN" mark on dip stick ,then you do not need to worry. does your car exhaust has bluish white smoke? does your coolant has oil in it ? are there signs of oil leak?