Ok first of all the sensor is BS!!!! All it uses is time and milage to come up with the oil change intervals. If there was actually a sensor in the oil that monitored Parts per million then when you did a oil change it would go back to zero miles with out having to hook up to a computer to reset it. Well it does not. You have to reset it.
PS: Nort I beat the crap out of your cars when I was out there!!!! I am amazed that you did not get any tickets in the mail
Oh ya and like some one else said it is a lease car and unless you are planning on buying it back at the end of the lease then I would just do what they say.