Warm & Canadian Tire

Since it was unseasonably warm today I decided to take the opportunity to go to Canadian Tire and get my oil/filter changed and change my wipers. It was 20$. I am not sure how it worked out so cheap. I did bring my own 1L [or are the bottles 2L?] and filter, but I'm sure something was calculated wrong. The womean mechanic said it requires 4 bottles for a 'change'. It took 15+ min. :-)