It's been three wonderful months since I got my 05. Although I only put 350 miles on her, I decided to do an oil change yesterday. I did an oil change on the week of delivery with the shorty filter that I picked up from the local Acura. I received a dozen of the Denzo filters just last month, and that's what I put on yesterday. I was surprised that something felt different right away. Everything seems a bit smoother, especially in 1st gear. When the car was cold sometimes it could feel a little rough in first gear at low rpm. Now it's silk smooth. The NSX was flawless, but now it feels perfect. Maybe it's because the morning is warmer now, or maybe it's just my imagination. But I still want to thank the folks who recommended those filters and all the information they posted.