Yes I read that before. That however doesn't answer my question lol..
There's a difference between revving a car while stationary or revving a car while under load.
In the case of oil leaking from your rocker covers you'd be best pulling off your valley cover and removing your coil packs.
If you do see oil leaking into those cylinders make sure you grab a rag and soak up all of the oil rather than removing each spark plug and letting the oil drain on to your pistons
What changes have you made over the last 3 months?