Why is my 2007 Honda Odyssey get bad gas mileage?

here is chart of owners and what MPG's they are getting, looking at it, your car is perfect. http://www.fuelly.com/car/honda/odyssey

What air pressure are you running in the tires?

Bob, his MPG is right on the money as compared with others owners of the same year car...

These vehicles were never designed for really great fuel economy. I knew a few people who had them and complained about it when they were only a couple of years old... look, they have a relatively large V6, they're very heavy and not too aerodynamic... what do you expect...? Tire pressure?? All cars should have the appropriate tire pressure for their particular vehicle... And, finally, there's countless stories of cars that are "rated by the EPA" for better mileage that don't deliver in real world conditions".... And other stories where a manufacturer had to revise and apologize for making claims that could not be substantiated... SO, get over it and suck it up, you have a large utility vehicle that carries a lot of passengers... If you load up your Honda Odyssey with a full load of people, your mileage will even be lower!

Mark, I took my old 2004 Honda Odyssey on a 400 mile trip and got 25 mpg with 6 passengers and myself.... and this 2004 has 180,000 miles on it and was rated for 24 MPG. Arnie

I too have had Hondas that met or exceeded the EPA estimates. Under-inflated tires and a heavy foot are the most common causes of poor fuel mileage on a properly tuned and operating motor vehicle. As joemom said, your vehicle is right in the range of what others are getting. A good place to get an indication of what fuel mileage vehicles are actually getting is www.fuelly.com

I just bought a used 2004 odyssey well maintained. It runs very smooth, idle holds steady, nice power acceleration, tires are good, and it feels as it's well tuned. But so far as i can tell it gets horrible gas mileage without even carrying any load. I just put in $10 (aprox 3 gallons) gas when reserve light came on and then drove about 25 miles when reserve light came back on again. That works out less than 10 miles per gallon. Something is not right, maybe the gas gauge is not reading correctly below 1/2 tank. I may have to fill up to the top and base the mileage on the full tank (20 gal) to be sure on the gas millage. Though the few Honda owners I know have all said their Honda's get poor gas mileage in comparison to other equivalent Japanese cars.

Arnie, I agree with you. There is definitely something wrong. I am the original owner of my 2007 odyssey and used to chart my mpg religiously. On road trips with my family to Florida, Colorado, and anywhere else, the van would always track around 24-25 mpg, even with a double jet ski trailer in tow( I couldn't believe it either). However, in the last 3 years as I've been tracking on road trips, it down to about 19-20. I changed the plugs, and increased to 21-22, but I still believe there's something that is hurting the mpg.

Honda recommends valve adjustment performed at the 100k interval. I have seen multiple instances where performance and economy both improve substantially. If you don't have a record of this being performed, go invest the $4-$550 on the service and reap the rewards. In addition to poor performance and economy, the longevity of the engine is shortened from Honda potential to like....a Buick Enclave or something