I know that this question has been posed in this forum before but I can't seem to find the correct threads that I stumbled upon from a friends computer the other day. In a nutshell, I recently bought a 2013 WRX and took the car on my Thanksgiving vacation/business trip to VA and back (from FL) to break it in, get a better feel for it, etc. It was not until my return trip that I noticed the sticker on the inside of the fuel door stating to use premium fuel only. As a perfectionist and someone who bought this car purely for the performance and fun factor, I am sick to my stomach that I made such a bonehead mistake for the first 3,000 miles of my car. How much damage did I likely do and how can I best remedy the situation besides the obvious solution of putting premium only gas in the vehicle from here on out? Should I have the dealer reset the ECU? I am a complete newbie to the WRX (obviously) and performance cars in general, so any advice would be greatly appreciated. Thanks.