Tempest Oil Filter

This question has been answered here - https://www.rotax-owner.com/en/912-914-technical-questions/9725-tempest-oil-filter_1

The Tempest, Champion or any other after market filter are not approved. The person that told they were approved is wrong.  Their issue for one is the low by-pass pressure. Those are 13-15 psi and the Rotax one is 18-22 psi. If you are in warranty and have an issue and they see an after market filter forget help. The difference in price is only $1-$2  so why not just stay with the Rotax filter.

Don't open a can of worms you're not prepared to eat.

That's what I figured. The wording on the filter was very sketchy.  The plane owner kept trying to convince me that those are great filters since aircraft spruce sells them. I told him that no matter what, Rotax said NO. 

Thank you for verifying my suspicion Roger!!!!