I would not use Adnoc / ENOC engine oil other than little top-up in an emergency situation, as I don't think they have a very good capacity to manufacture engine oil that meet / exceed specifications of other international top-tier engine oil manufacturers such as Shell, Castrol, Mobil 1 etc.
If you are on budget, to avoid the the dealer service I would highly recommend what Kasim said to go for Mobil 1 or any other good international engine oil brand and go to ADNOC / ENOC and ask them to change, they will charge 20 dhs labor for oil change and you be 100% sure that you have put good quality stuff in your car.