Eric,
Buy a washer from your local dealer, same with your filter and show them your receipt for your oil and you will able to have your own oil change added to your Service History.
I have had this done twice as I am now out of warranty and under mileage for the year
(not that it makes a lot of difference to Mazda policy, though if you are not using the car then no wear is taking place, so services should be on mileage, not time ).