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I am using an OBD-II sensor and the Andriod Torque app to look at my fuel economy and see that it shows a whopping 37 MPG for my Mazda 6, 2005 (2.3 Automatic). This seems fishy as some random googling shows the US Gov rates it at less at around 23.

Anyone else had some experience with the torque app? can you confirm that its in accurate? Also where does the inaccuracy lie, the ECU or the App?

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Have you double checked the MPG yourself? Check out steps 1-6 –  Tim May 10 '12 at 16:41
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I use an app called "Road Trip" (iOS) that allows me to enter all the data at every fill. It shows me that my mileage is 22 mpg in my Tacoma, where my OBD-II is telling me that I'm getting < 20. –  Chase Florell May 10 '12 at 22:00
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up vote 3 down vote accepted

I can't speak to the Torque app, but in my experience the US Gov ratings are typically quite a bit lower than what you can expect to get in actual normal driving (Gov ratings seem to be based around someone that does 15mph+ over the speed limit all the time, launches from every stop light, does full-throttle passing, and doesn't see red lights until they have to stand on the brakes to make them). So, it's not entirely impossible, but you're getting even better indicated than I would expect given that. Definitely time to compare with actual measurements.

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The EPA lists their specific test procedures: fueleconomy.gov/feg/fe_test_schedules.shtml The whole point of this sort of experiment is to gather representative data. There is a "high speed" test procedure now that captures some of the spastic nature that you describe but it isn't quite that silly. –  Bob Cross May 11 '12 at 15:28
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