s5 owners-are you usung front cover gasket?
 

or are you using silicone? this is with oring and white teflon ring thanks.

oring only with silicone

Could someone explaine this a little more. I remember seeing something about not using the gasket a long time ago, and since I'm rebuilding the engine next week, it's something I should consider doing.

please use the search function, this has been covered like 100 times

here is one resource as well...

http://mazdatrix.com/faq/oring.htm