I took a trip with the sunfire up to my brother and sister in law's place this weekend. It did much better than I expected on the freeway. 36 mpg up, and 37.5 mpg back! I'm impressed. That was at 65 mph too. That bumped my tank mileage up to 34.
And, then this morning I got a new best trip into work at 39.8! My previous best was in the mid 37 range. SO close to breaking 40!