Use your vehicle maintenance schedule
Enter the limits applicable to your vehicle from its manual or confirmed maintenance plan. The starting values are an example, not a recommendation for your engine. Set the hour limit to zero when no hour interval applies. Each limit is checked separately.
remaining = scheduled limit − usage since last oil change
Worked remaining-interval example
With a 5,000-mile limit and 3,500 miles driven, 1,500 miles remain. A 12-month limit after eight months leaves four months. The first applicable limit reached governs the schedule. A negative number means the entered limit has been exceeded, not that extra use is available.
Operating conditions and the vehicle monitor
Severe use may have a separate schedule. If the vehicle has an oil-life monitor, follow its operating instructions. This tool does not analyze oil or automatically account for short trips, temperature, fuel dilution or load; the chosen schedule must reflect those conditions.