I've noticed for the last month or so, when I accelerate in any of the above mentioned gears, my engine sounds "loud" and not normal. I've owned my SX 6 speed for over a year now and know it well. I took it to my dealer and had one of the mechanics do a drive along with me. It took awhile, but finally he heard it too. He seemed a bit confused on what it could be. I have it scheduled to go in to the shop so a senior mechanic could check it out. Anyone else had anything like this?