Petitgrain essential oil resembles Neroli and is a very useful aromatherapy oil in its own right. it is especially good for for oily skin and greasy hair. 
 
It's believed to be helpful in balancing sebum reduction.It's also been used for refreshing oily hair (try putting 2 drops in the final rinse after shampooing greasy hair). Petitgrain aids relaxation and is a good stress-reliever with excellent uplifting properties. You may find it particularly useful for the 'Winter Blues' or S.A.D.