firemanw8366
New member
This may be old news but I found these cross-referenced oil filters for the 4530 and others. Wix is 57731 and Napa is 7731. Check out wixfilters.com and napafilters.com. Apparently these aren't yet available, but they are coming soon. I'm hoping that Amsoil will update their filters on the high filtration Ea line. Hope this helps somebody