[I]Dear Asif ! I would suggest that you should change the engine oil due to following reasons:
[/I]1. New engine parts have protective layer of fine grease / different type of lube oil, for protecting them from rust etc. and for their longer shelf life. When new engine starts running this layer melts and get mix in engine oil. Thats why most car manufacturers recommend FIRST OIL CHANGE after 1000 KM.
2. We don
t know first owner of your car (Japani) has done it or not. Your car is only 1800 KM driven till now.
3. Lube oils always have their shelf lives ranging from 6 months to 02 years. Don`t keep your purchased oil for much longer period.
This is only suggestion, decision will be yours.