I tried a basic Ecogard filter and was disappointed. The glue on the endcaps was inadequate and there were gaps in the filter media as a result. I don't reccomend them.
Inadequate as in failure?
Gaps as in failure?
I highly doubt both. What's inadequate for you may hold up well for 10K.
Gaps in media mean absolutely nothing in protection. We have pics of Tough Guards going 20K with gaps. It help up marvelously. Proline filters have Gaps City. We have engines with 420K using them.
If there's no failure in your defintion of inadequate and no failure in gaps, then where's the problem?