You could try some 87 octane but with the automatic (that's what I have), I noticed a slight hesitation and power loss at low rpm. Like right off idle and at around 30-35 mph when it is lugging along at 1000 rpm. The intake drone inducer would cackle a bit as the throttle is pressed- slight hesitation and then it would accelerate. The outside temps were pretty high around 95-100 degrees.
Ditto here. The hesitation only happens every now and then at low RPN's. I'm going to try 91 octane next time I fuel up to see if it makes a difference.