My WiSE was originally very sluggish.. like no power. So complained once, they adjust adjust all kinds of things and changed the engine bushes because they had worn out (NEW CAR!!!) and my steering bush too. Still sluggish so they asked me to take the car to a center that has the PDT thingy diagnostic machine. Either Sungei Besi or Glenmarie. Then they took 1 day to tune (I think long queue la) and test drive for a week. Fuel consumption was high! Take back to Sungei Besi to retune and re-adjust the gear ratios because I complained it was dragging too high before changing gears. I didn't care about the top speed, just keep my petrol consumption low and give it a little more oomph on low revs. After 4 trips there and lots of complaints I managed to fix everything.
Then it got sluggish again. But this was because my TB was dirty as hell. So cleaned it and now my car is not exactly fabulous, but it does better than some cars lor. But with the new fuel increase, I think my expenditure gonna go up again. For sure.