To see good results from adding oil to your hair you should leave the oil in your hair for at least 15 to 20 minutes after massaging the oil into your hair.
Massage the oil into your hair and leave the oil in your hair for a minimum of 15 minutes but the longer you leave the oil in your hair the better results you'll get.
I'll sometimes massage the oil into my hair and then put a shower cap on and sleep with the oil in my hair overnight for the best results.
Then in the morning I remove the shower cap and wash the oil out of my hair.
But you can wash the oil out of your hair after 15 or 20 minutes if you wan too but the longer you leave the oil in your hair the better.