from what I gather most of you get better performance when it is cold out. I kind of have the opposite going on though, when it'* warmer out my car drives so much better. It feels like it'* having a lack of power when it'* cold out, but as soon as it'* above freezing it drives a lot better, it has a lot more pep to it. any comments on this?

Could be a matter of your car getting up to operating temps. Otherwise you should get better performance in the cold....hmmm....anyone?

I have a 2000 bonneville ssei and its a lot quicker in cold temperature. :?

I get best performance when the engine is a peak running conditions and the air temp is about 3 degress Celsius or maybe 40F