I got owned be a Toyota Corolla, it's that bad! I do not blame it on the fuel as the difference in brands is very minimal; I might be wrong here. I tried over-revving when the car was not pulling on slopes but, the rpm did not increase more than 2500 even when the accelerator was stamped to the floor. As you said, I'll fill-up a few times with local gas & observe the difference. This time I'll try Texaco, I believe that's a top-tier gas that contains techron.