i have a 2011 mazda cx-7 turbo which, according to my dealer, takes the cartridge filters. i keep on finding conflicting info on this. some places shows it takes a canister filter others showing the cartridge. so assuming it takes the cartridge filter what are my options out there as far as which manufactures make cartridge type filters? it looks like my options are limited. i know amsoil makes one which is nice. any others?