I didn't really think about it too much till the other day when I posted about my fuel mileage. Heres my issue. Today driving into work I averaged 35.3mpg with no a/c on. When I turn on my a/c I get about 18mpg. Is this normal? I just contributed it to being a 4cyl. Also with no a/c on the car runs between 198-202 degrees. With the a/c on it runs from 207-215 degrees. Any thoughts?