Your vehicle’s electronic oil reminder uses a custom algorithm to determine the life of the engine oil. The parameters include starts, run-time and mileage. I wouldn’t go less than 10% oil life (you will get an additional warning when an oil change is necessary) or longer than 12 months. As important as oil changes are, checking the level of engine oil is critical. Today’s engine will use some oil between changes and operating an engine low on oil will cause excessive wear.