[Perfectlap]

Is anyone else noticing much smoother and happy sounding engines in these crisper days of fall? It seems especially noticeable in the evening when there aren't as many cars around and I can filter out all the traffic noise. It strikes as though there is a point where the cold air coming in has a sweet spot. I've been keeping a log of each drive and temps to see if I can notice a difference as the weather gets colder.