So apparently the cold weather doesnt affect the cruze mpg as much as I was expecting. Yes my overall mpg for the fall has decreased by 5 mpg which was expected. The picture below shows that in calm, gentle 30f degree weather or 95f degree weather mpg will remain consistant. Over the next couple weeks the weather in the 4-5k elevation Idaho mountains will experience 0-20f temperatures it will be interesting to see what affect this has on mpg as long as the weather remains calm and not windy.
On a side note I try to keep my tires at 38psi *cold* and is actually about where they stay while driving on the highway * warm* which is about 2-3psi less then my summer months pressure.
These mpg numbers are identical to what I see during the hot summer months on this particular stretch of highway.