I agree with Panzerman. Purolator and Wix are great filter options at a reasonable price if the EaO is not available for your application. I pay $3 regular price for Purolator Premium Plus filters. I just tried to find "Grease's" oil filter study (www.oilfilterstudy.com). If I remeber correctly the Premium Plus was very close in terms of filtering and flow performance to the K&N, for less than one third the price. And both the Wix and Purolators seem to have a good track record with many on this site. Both appear to be mad well. I just tried to locate the study done by "Grease" (screen name) but it appears not to be on the net anymore. K&N is probably a great filter too and the new Amsoil EaOs appear to be top notch. 10K OCI with Amsoil is probably fine. My recommendation - Purolator Premium Plus about $3 to $4, PurOne, $5 to $6, or Wix (unknown price) but probably very reasonable at Fleetfilter, one of this site's sponsors.
Good Luck !!!