Biggest overachievers and underachievers in real world highway MPG

[IndyFetch]

I have a 2010 Honda Fit Sport 5-speed. it is rated 33 highway, but I averaged 44.3 for 2016. I live in the snow belt, so mileage drops off from late November through late March due to temperatures and winter-blend gasoline. Throughout the summer, I averaged 47. I had a 2008 Civic Si that was rated at 29 highway, and I averaged 36. Before that one, I had a 2005 Civic Si that was rated at 28 highway (on the 2008 scale) and I could barely eek out 30 mpg. I once had the great 1995 Civic VX federal model, which was rated at 56 highway on the old scale (50 on the new scale). I averaged 60 on the highway, and had several tanks in the mid-60s. My best was 77 mpg with a lot of drafting. My 2006 Odyssey is rated 26 highway (on the 2008 scale) and that is the best it will do, albeit while loaded with the whole family and a few hundred pounds of crap in the back. My old 1998 GMC Sierra C1500 (regular cab, long bed, 5.7L Automatic 2WD) was rated 17 mpg on the highway (2008 scale), and I could get 21 mpg out of it, despite a tall camper shell on the back.

[R.I.D.E.]

Originally Posted by IndyFetch

I have a 2010 Honda Fit Sport 5-speed. it is rated 33 highway, but I averaged 44.3 for 2016. I live in the snow belt, so mileage drops off from late November through late March due to temperatures and winter-blend gasoline. Throughout the summer, I averaged 47. I had a 2008 Civic Si that was rated at 29 highway, and I averaged 36. Before that one, I had a 2005 Civic Si that was rated at 28 highway (on the 2008 scale) and I could barely eek out 30 mpg. I once had the great 1995 Civic VX federal model, which was rated at 56 highway on the old scale (50 on the new scale). I averaged 60 on the highway, and had several tanks in the mid-60s. My best was 77 mpg with a lot of drafting. My 2006 Odyssey is rated 26 highway (on the 2008 scale) and that is the best it will do, albeit while loaded with the whole family and a few hundred pounds of crap in the back. My old 1998 GMC Sierra C1500 (regular cab, long bed, 5.7L Automatic 2WD) was rated 17 mpg on the highway (2008 scale), and I could get 21 mpg out of it, despite a tall camper shell on the back.

Move to central Florida and your figures would be 20-30% higher. I live in eastern Virginia and my 58 average in a car (2015 Mitsubishi Mirage) rated at 42 highway is considered "overachiever". If I lived in your area it would be about 50 (again rated at 42).
The best mileage Mirage owner I know of gets 65 average and lives in south central Florida, not close to metropolitan area traffic.