Which engine oil is preferred for daihatsu hijet cargo 660cc and in what quantity?

I have 660cc Daihatsu Hijet cargo car and it is run 100,000 Km . which engine oil i use for my car . but brand i like to used ZIC but i am not sure about it grade?
Kindly

Diahatsu recommends 5W30 SAE or 10W30 either semi-or fully synthetic. Fully synthetic is better oil. Whether you choose 5W30 or 10W/30 depends on your climate. If you have frequent days before zero C, 32 degrees Fahrenheit, you may opt for the 5W30; otherwise, the 10W30 in the one you'll want. Selenia oil tends to be the least expensive of the synthetics and it's a fine oil. (I buy mine at Carefour Suermarket.) FUCHS is also very good and doesn't dent your pocket book. Mobil 1 and Vavoline are quite expensive in Europe, and Motul and ENEOS are outrageous.