Nido Brother, just to clear one mistake, this shape was last produced in 2004, 2005 is of a new Bull dog shape. So, please check again, this is a 2004 model.
Anyways, I own a vitz and have been fully satisfied with Liqui Moly. Grades usage depends on your enginer condition. For my mid-performance engine, I use 10W-40W and last upto 8000km.