A fairly straightforward way to do it as follows:
1. Engine off, turn ignition key to RUN - do not start engine - make sure dashboard indicator lights come on
2. Put foot top of accelerator
3. Completely depress and release the accelerator TO THE FLOOR, THREE TIMES in rapid succession, within FIVE SECONDS - press release, press release, press release. Then wait a few seconds and the CHANGE OIL light should usually flash, sometimes accompanied by a few short beeps. Once it flashes it should disappear, and it should be reset.