Bought a Fileder 2006 2 months ago. I had the same dillema of chosing the 'right' engine oil for it. Today went to buy it. Had in mind the same 2 options just as yours. The prices of these were as follows:
Caltex Havoline Fully Synthetic Rs. 2,300
Zic XQ Rs. 2,800
The mechanic showed me that previous oil was way too dirty. So I had to use the 'Flushing oil' of GULF. Its price was Rs. 1,500. So for economy purpose I went for Caltex (after getting engine flushed first). Next oil change has to be bit sooner than routine (due to previously dirty oil). So for this time I decided to use 'cheaper' one of these two.
My advice to you is to first see the condition of previous oil, then decide.