We just got 48MPG out of a 2005 manual toyota echo(same drivetrain I believe). It's my friends car, we drove about 300 miles of pretty much highway at 60mph, we drafted abit but it didn't really show any benefits on the scangauge which was a surprise. It would consistently cruise at around 50MPG at 60 mph.
Try going slower and it might really pay off.
Ian
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