one of two ways-
either you go into the EVIC menu to reset it, or you turn key on, depress accelerator three times to floor and turn key off. this should reset the change oil light.
If you do this, and it doesn't work, just start the car, wait a minute, kill it, and come back in 10 minutes.
Then turn it to on (just before "start") and floor it 3 times and turn the key off again. Should clear it.