Spoke with Royal Purple and they too start with a pure synthetic base as do others but they don't do air filters.

20 microns? That is a LOT of dirt getting through and into the engine. No oil on a mesh filter like that is trouble as well - EVERY one I have ever encountered like that is designed to use oil as the first and important level of protection. K&N and Green Filters (as well as stock drop ins) remove down to 5 microns.

Saw a great test on filters at SEMA and am working a deal with Green Filters for their drop in (beats the K&N in airflow by a significant amount but equal filtering) and cone filters (with heatshields) for both SCed and stock intakes. I also located a source for REAL carbon fiber tubes.

Will post a complete review and pics next week of all the cool potential VX things and more!