I don't have an OLM but this is what i would do if I had a similar situation:
Before disconnecting the battery I would note the mileage on the current OCI, then disconnect/replace the battery.
After that you simply need to momitor the mileage on the OCI just like you did before you trusted the OLM. I would guess that around 5000 mile mark the light should come on (if it wasn't reset when the battery was changed).
If the light does not come on, I would change the oil and reset the light again.
While this doesn't answer your question, it will certainly be a safe approach and would not put too much strain on oil.