You can look up real world MPG on a site like fuelly.com. It looks like the first gen Honda Insight is over 55 MPG on average. There aren't enough cars to get a

You can look up real world MPG on a site like fuelly.com. It looks like the first gen Honda Insight is over 55 MPG on average. There aren't enough cars to get a great sample but they list about 75 cars between 2000-2006.