Bought my Camry SE in July, 2007--4 cyl. w/ auto. transmission. Traded in a V-10 Dodge 4x4 for mileage reasons--went in to get a Corolla, but figured for a little less mileage, I'd get a larger car with more comfort and a body style that I find much more attractive than the Nissan or Honda "equivalents." Anyway, on to the mileage question.....
At the time of purchase, I had a 77 mile round trip to make daily for work--about 7 of it city driving, 10 of it highway, and the remaining 60 interstate highway. Because I figured out the time differentials, the difference between driving 75 on the freeway (70 limit) and 65 was about
3.5-4 minutes difference; I kept it cruise-controlled to 65 mph for the trip and let the cars pass me (3 lanes on the interstate for 50 of the
60 miles). This being said, 30-31 mpg avg.......Trips outside of this steady "study," and using speeds of 70-75 (not many of them to make a definite "claim") usually knocked it down to 28-29 mpg.
I have since moved and my driving is now primarily city driving (7 mile round trip to work) where the car does not get properly warmed before it is time to shut down and go into work--it has cut my mileage dramatically. I have been doing this new routine for four months now, and have been getting 3-4 weeks between fillups (as opposed to every 4-6 days before), and have been seeing 20-24 mpg.......Still much better than the 8.5-10 mpg I would've been getting with the V-10........
Hope you find this helpful........
Stan