it looks like it should be replaced every 50k miles which i am at 97k and from what i have read on pcv valves is that they tend to get clogged. common sense would tell me a clogged valve will spit up a little bit resulting in that oil on my block head. thanks psl for the part name, this could also be why my mileage is suckin lately, i guess i get to have some fun tomorrow, im buying new head light bulbs anyways so just a days work on the car haha