Just take it to the dealer and get a rental like I did today. Car lost total power and steering control WHILE driving (not kidding) so I'm anxious to see what they find. My Camaro has 2300 miles on it and I only put 91 octane in it now (hard as hell to find 93 around where I live).
Also I've driven it at cold (meaning hardly a warm up) and had nothing like you are describing so it is an issue. I let mine warm up a minute or so now. Besides I wipe mine down as it warms up. Kill two birds with one stone!