2012 Mazda 3 Consumer Review: Computer MPG is off

2012 Mazda 3 - Consumer Review

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Computer MPG is off
By jackstraw22 on


2012 Mazda 3 i Touring 4dr Sedan w/SKYACTIV-G (2.0L 4cyl 6A)


I've had this car for about 2 months and while I do enjoy driving it, I've noticed the computer's MPG is off.
I've checked it several times by filling up my gas tank, resetting the trip meter and then resetting the computer's MPG.
After running it for about 300 miles I filled the tank back up.
I then divided the miles on the trip meter by the number of gallons I put in the car.
My latest manual observation was 27.2 MPG while the computer's MPG was 29.8.
So far my driving has been about 90/10 city/highway, so I'd expect the MPG to be low.
But I would have expected the computer's MPG to be more accurate.
It's been off on every test I've made.

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