Can the oil come off the K&N filter?

Max air speed over the one filter they speed tested was just under 13mph. One setup included flowing 1000 cfm fer 3 days straight...with no oil coming off an over oiled (~30%) K&N filter.


1998 T-100 Xtra cab SR5 2WD Auto; Roadmaster Active Suspension; Yokohama Geolander HT-S; lowered air dam; full belly pan; 4? diffuser; 11" side skirts; dual transmission coolers; 67% grill blocked; Auto-RX'd; ScanGauge II/Ultra-Gauge