I'm due for my first oil change and am interested in extending my oil change intervals since I put around 3k miles/month on my Mazda2. I'm getting Amsoil 5w-20 (the shop couldn't get 0w-20), and putting a Mazda oil filter in. Has anyone had any experience with extending the oil change interval to 7.5k or even 10k miles? Will the Mazda oil filter go this long?