My second tank was slightly better (no dealer/car rental fill up issue). I did mostly highway (about 70%) and kept the AC off most of the time. The low gas warning light came on at 265 miles this time (versus 220 the first tank). Filled at 287 miles since last fill-up (see below) with 17 gallons, for a 16.9 mpg average this tank. This is still below the 18 mpg city for mostly highway driving, and way below the 25 mpg highway estimate. Also, kept acceleration below 3000 rpm all the time and below 2000 rpm most of the time. Avoided speeding up/tail gating/braking often, and used cruise control for highway driving.
Using 87 octane for now. May think about higher octane experiment later. Anyone have any additional suggestions?
Anyone with a longer driving history do any AC experiements or comparisons (winter versus summer) on the fuel efficiency?
Some of the boards mention 2002 Odysseys with similar low mileage reports, but seems that the 2003 Odysseys have many more complaints. Aside from normal variances, software/emmision programming, or failed components/other defects, could the origin of the car or some components have something to with this?
FYI, my Odyssey was assembled in Lincoln, AL, Engine: USA, Transmission: Japan.
Didn't Honda shift a lot of Odyssey production from Canada to US sometime in 2002? Were most of the engines from the US? Is there more than one plant? If you have a non-US assembled Odyssey or engine, please report your mileage experience.
Here's some additional data
Also check out this thread
13.9 mpg is normal?
Originally posted by macosx
Just got back from the gas station at 260 miles, filled up with 19 gallons (that was $40 for the tank!?!). That's a disappointing 13.7 mpg!?! It also means that the low gas warning light came on with about 4 gallons left in the tank. Although a little high, with the low milage, it seems acceptable. Now what to do with the low milage? I'll see how it does with mostly highway driving and see if turning off the AC will help.