Navigate to the oil life display and reset it like you would after an oil change, once reset pushing the button again should de-increment the oil life by 10%, repeatedly pressing this will eventually get you cycled back around to 100%. This will set your default starting oil life, as I understand it 100% = 5000 mile oil changes, yours seems to be set on 4500 mile oil changes, 60% would be 3000 mile changes. There is no oil sensor, at least not one that measures the condition of the oil, instead the oil life is based on a calculation that takes mileage and time into account, it may also incorporate more factors but I can’t be sure. Again, this is as I understand it.