actually. IMO an independent diesel engine should be 2.0 litre to work properly without the aid of turbo. for 1.5 diesel, its a must to install turbo. don't get me wrong. cause 1.5 might seem underpower. even the wira 2.0 diesel still feels sluggish when it comes to the petrol versions. if it can provide good mileage then i think there should be not problem. any test rats?