Because oil life can fluctuate depending on your driving style, automakers have begun installing oil-life systems that monitor how you drive and alert you via a light or message when an oil change is due. The 2013 Chrysler 300 includes an oil-life system that displays am "Oil Change Due" message when it is time to change the oil. After completing the oil change, you need to reset this system manually, so it can alert you when the next oil change is due.
Resetting the Oil Change Message
Enter the 300 with the key, and press and release the "Engine Start/Stop" button without touching the brake pedal once to cycle the ignition to its "On/Run" position without starting the engine. Press the accelerator to the floor and release it three times within 10 seconds of cycling the ignition to "On/Run." Press and release the "Engine Start/Stop" button without touching the brake pedal to cycle the ignition to the "Off/Lock" position. Start the vehicle and verify that the "Oil Change Due" message no longer appears. If the message still shows, turn off the engine and repeat this process.