How often do you all check your tire pressure? It's starting to get cold here in New England, and when I checked mine this morning, they were quite low. I pumped them up to the door-indicated 44F / 48R pressure. I hadn't noticed the slow degradation. The car definitely handles at its best with proper tire inflation. Not to mention you could be putting yourself and others around you in an unsafe situation if you're driving aggressively with underinflated tires.