For oily hair, you shpuld not brush your hair often, because this leads to the increased flow of natural oils from the roots making the hair more oily.
Preferably use a comb than a brush to comb the hair.
Proper cleaning is very important to clean the oil from the scalp. Use lime or protein based shampoo for this type of hair.
If you do not clea the excess oil , then dandruff will develop . Oil and the dust particles will join
together to form dandruff. If the hair is very oily the, use a baby shampoo for cleaning daily.
In a mug of water, mix in juice of half the lime and 2 tbsps of vinegar and use it as a final rinse for your hair.
Dissolve a small amount of fuller's earth / multani mitti in water and apply on the scalp. leave for an hour and shampoo.
Mix juice of half a lime in one egg. Apply on the scalp with fingertips. Leave for half an hour and then shampoo.
Henna is a good conditioner for this type of hair. Henna will add extra bounce and shine for your oily hair, if you do it regularly.