What would be causing my rpms to run around 2900 at 65 mph?

What is your question?

I noticed my fms indicating around 25 mpg. I used to get around 32 driving back and forth to work, a mile or two less in cold weather. Also noticed my tach was running around 2900 rpm at 65 mph where I think normal was around 2100 rpm. The car has 39,000 miles and it is an automatic. It seems like it might not be kicking into OD. I noticed I started getting poor gas mileage within the last 2 weeks. Now that weather has gotten above single digits, it has not improved.