Sonata MPG

Our 2011 Sonata is EPA rated at 22MPG City, 35MPG Highway and 26MPG combined. For the first nine months I haven’t really paid too close attention if it was meeting those expectations.

The Sonata has this little button on the dash that says ECO. When we first got it I kept in ECO Mode because I figured it would increase the gas mileage of the car. Then I ran a couple of totally unscientific tests by emptying a tank full of gas with the button on and then a tank with it off, it really didn’t seem to make much of a difference.

My non-calibrated butt-dyno did seem to feel that the shift points were changed while in ECO to keep it in a lower gear longer. With ECO off the shifting felt a bit sportier. When the Purple Whale had his 7500 mile check up, there was some sort of bulletin about the transmission and they reflashed the ECU. It totally changed the feeling in the ECO mode to something such that I can no longer tell the difference between the shifting characteristics of the two modes.

Neither of these two issues aren’t the real reason I have abandoned using the ECO mode entirely though. My biggest issue was that when the ECO mode was on, it displayed 1/8″ high letters reading ECO in bright green in between the speedo and tach. And if that wasn’t annoying enough the button on the dash to the lower left of the steering wheel had a super bright blue LED that glowed steady, it was noticeably in the day, but at night it was almost searing.

Anyway, where am I going with all this? Well, I keep track of the top transitions for the Miata, so I thought I’d keep track of something for the Sonata, its gas mileage. I signed up for an account on fuelly.com that would take care of all that higher math stuff for me. They have a couple of badges for web sites or internet forums and I’ll probably add the little one over on the right somewhere.