It may be worth your while to look into an ultragauge or scangauge. That will allow you to get instant feedback about what works and what doesn't for hypermiling. For example, you said you're accelerating slowly, it may be better off to accelerate a bit quicker. Acceleration is the worst for fuel efficiency, so by accelerating slowly you may drag it out unnecessarily long, where it may be better to accelerate briskly and get up to speed quicker.
30+ MPG is still good for a stock car, especially for starting at only 25. You should also look into some simple mods like a grill block, tire spats and an air dam.
__________________
|