as i have said many times before, these are city cars and therefore have alot of stop-start use and that means that you should pay alot of attention to the oil changes.
personally i suggest mineral or semi-synthetic since it's better to change oil more often than pay for a very expensice oil and pray it holds up for a long time.
however if you can afford it, the ideal setup would be to use fully synthetic and to change it regularly (but i can NOT justify doing that).