Wix is the best cartridge filter I know of for this car. I don't think you'll be able to do much better.Great to hear! As I was driving home yesterday I was thinking I would go 18K total and change filter at 9K if that was deemed appropriate. Is there a better cartridge filter than the WiX? Other than a bypass setup. I am going to research running the filter longer or a better one. 18K intervals is about 1 yr for me so timing is perfect. I am so happy with Amsoil and their products.