www.autopartsonlinecanada.com has oil filters for $15.95 CAD
Euro Parts etc Canada at
www.europartsetc.com has free shipping on orders over $75
Best Price Auto Parts at
www.bestpricecarparts.com has filters for $14CAD and free shipping on orders over $75
autopartsonlinecanada.com also carries oil filters.
I haven't used any of these online places yet but I'll be placing an order soon.
For Mobil 1 I found it at Parts Source, but call ahead to make sure they have it in stock. I cleaned them out last year and they only had enough to do one of my cars.
Here in Toronto Mobile 1 can also be picked up through the main distributors warehouse.
Here is a list of distributors in Quebec
http://map.essolubes.ca/
Regards,
Aron