Yeah, I’m not very happy with my mpg. Couple of months ago I actually called my Honda dealership and said I’d like to make an appointment for them to figure out why I’m not getting good gas mileage. Their response was very arrogant, saying that all they would do is drive on the freeway for 5 miles at low acceleration. Just enough to maintain speed. If it gets the gas mileage than is on the sticker, the test is over. They really have no machine they can put it on to do a more thorough test. So, I did that test on my own. If I seriously baby the gas pedal then it does achieve the mile per gallon for highway on the sticker. However, if I use what I would say is average acceleration around town, my city driving barely achieves 19 MPG.
Also, just to address earlier comments. The rim size has nothing to do with affecting your miles per gallon. It’s all about the overall size of your tire. Also, the composition of the rim and rubber can make a slight difference. My rims might be 20 inches, but the lower profile brings the overall size of the tire to the same as stock. Including the width. And I didn't purchase super soft tires that might explain a small loss of mpg.
When I drove it home to California from Chicago where I bought it, my average mile per gallon was around 29. Considering that was completely freeway, I thought even at that time that I should’ve gotten better than 29. But I thought maybe it was because of some of those freeways I was on being a much higher allowed mile per hour. So I wasn’t too concerned. However, now having it for six months and getting consistently on the very low end mileage I am concerned again. However, I have put too much into this car and don’t drive it enough for it to be much of a financial hit. Especially now that I’m working from home.
Part of me now wonders if this low gas mileage might be one of the reasons the previous owner turned in a car that they only owned for eight months. Who knows, the dealer couldn’t tell me why the previous owner sold it. Not that I necessarily expected them to know for sure.