Actually, your hair is not oily at all because it does not contain any oil producing cells - it is your SCALP that is oily. Use a good quality shampoo designed to control the oil production and it will cleanse the excess oil from the scalp properly. Yes, you can use jojoba oil on the hair shaft, but be sure to stay at least 3" from the scalp when you apply, and only apply a tiny bit. Even if it doesn't look/feel like you have enough, all it takes is about 1/4 teaspoon's worth for long hair. It will help to condition/moisturize the hair shaft and control dry, frizzy, fly-away ends.