I asked this question on the GDI Engine Introduction Thread and have gotten no response. I asked the Service Manager at a dealership I was visiting and he thought that this engine had iron sleeves, but the Introduction Thread videos do not indicate this. I'm concerned about cylinder wear over the 150,000-200,000 miles I would expect to drive a new V. If not, is there some new coating or process they use to get good engine life? For those not familiar with this, iron cylinder walls are harder than aluminum and hold an oil film that minimizes wear, whereas aluminum cylinder walls (remember the Chevy Vega) do not have a good record for longevity. Anyone know for sure? I expect to buy a V in 2-3 weeks.