Cold Weather and Ecotec.
Now, I know cold air is great for increasing engine power.
Lately, it's been below 50*F weather (minus a fluke on Thanksgiving 70*F+), down here in GA, and it seems like my Cobalt is eating this shit up! It doesn't feel like it has an I4 in it anymore, feels like a low displacement V6, it's nuts.
Damn, I really need to get an intake now if this is what it's like driving it in 80*F+ weather with a CAI.
On a semi-related note: my serpentine belt seems to be loving it too, a lot less slips on WOT shifts with the B&M ShiftPlus on stage 1. (Stage 2 is much too harsh for daily driving, I looooooooooooooooooooove stage 1 though, feels like I'm driving a car instead of a bus with a mushy automatic transmission)