To reset the 2017 Ford Mustang change engine oil life after an oil change service, please follow these instructions:

1. Turn the ignition to run (one position before starting engine).
2. Use the Up and Down arrows to scroll the Menu and select Settings followed by the Vehicle Menu.
3. Select Oil Life Reset XXX% followed by Reset.
4. Turn the ignition off and then start the engine to verify the indicator has been reset.