when your scalp gets a lil oily is that a sign you need a wash?

my scalp gets oily every three or four days.so should i wash every three or four days?
updated by @savage: 01/13/15 08:41:03PM

My scalp gets too oily about that time also and I typically wash my hair once every three or four days.If you wanted to, you can continue to let your scalp readjust to producing less oil by washing your hair once every four days.