You said to him free points, and if achieved this integration, and free oil change, then, is to give him change his Audi original oil, or a third party brands of motor oil.
You said free points to give him, if you reach this point, and then free oil change, whether to change his Audi's original oil, or third-party brand oil.
You gave him points for free. If you reached this point and then changed the oil for free, it would be the original Audi oil or the oil of a third-party brand.