I must confess, I am not a mechanic. I have a 2006 crossfire six speed. Since it has gotten colder over the last month, I notice, when I come to a stop, my car is still idling very high before it finally settles down after a couple of seconds when I come to a stop. Can anyone direct me to the cause of this? I hope that my description makes sense. I checked all my fluids and they seem to be in order, so I’m wondering if it is mechanical or just needs a tuneup?

Also, the Crossfire recommends Pentosin CHf-11s fluid for the steering. Will standard steering fluid work as well?