Link above, wayyyyyy down on the bottom, says this.....
"S Series
The PCM has the ability to calculate when the engine oil needs to be changed based on vehicle mileage, engine revolutions and engine coolant temperature, then bases the engine oil change interval within a window of 3000-6000 miles.
To reset the PCM oil life monitor, depress the oil life reset switch located in the underhood fuse box for five seconds with the ignition On."
