How do you increase gas mileage on Honda odyssey 2010 when I get only 17.5 to 19.8 freeway?

Answer 1

Find a semi and 'draft'... Sounds dangerous but its about the only way.

We have a 2006 Odyssey and love the van, but hate those pit stops on road trips. It doesn't bother me around town; but we sold a Grand Cherokee for this van because it was rated in the high 20's (I forget now). I've changed my driving style and our cargo and it yields some results.

The Odyssey, and every other smaller engine, has a greater percentage loss with heavier loads. So if you've packed 8 adults in the van don't expect good fuel economy. We recently made a trip from the mountains (so our elevation loss pretty much made the whole trip down hill) with 4 adults and 2 children and we got 22 mpg. I was pleasantly surprised but I don't know if driving 60-65mph was worth the kids asking "are we there yet". =)

In summary, you can expect just over 20 if you're driving slow and are mindful of the contents of your van.