When you do oil rinses or just apply oil to your hair, how do you wash it out and make sure there's no build-up?

I massaged Bringraj oil into my hair y'day (on dry hair) and co-washed today but there's still lots of oil in my hair that didn't get washed out. I am wondering whether to use a shampoo tomorrow to get my hair cleaned.

Pls help me ladies.