For a fact i presently use a premio NZT260 given as an official vehicle. Mind you if your hoping to run in colombo 1.5 gets you the best fuel figures since you would be spending half of your time on traffic. I have used both and with experience i would recommend a 1.5. 1.8 definitely gives more pulling power but saying that dont underestimate 1.5. If your hoping for daily running and rush through heavy traffic 1.5 would do for you!! And talking about second hand market, irrespective of the weight and the power of the vehicle 1.5 has a better demand than the 1.8.