My car's consistently given me a 1.5-1.8 mpg optimistic reading. I track mileage separately and always come in under the display. Mix of city and highway, across different octanes and ambient temps, just pretty consistently off. Compare this to my '10 Camaro MPG reading, which was dead on.
My 2014 R/T gas mileage at 55mph
Net elevation change of +336ft. I traveled from Kingston, NY to Castleton on Hudson, NY with cruise control set at 55mph. I filled up at the gas station in Kingston, and reset my average fuel economy gauge when I left the gas station. There's about a minute of local traffic before getting to the highway, and about 5 minutes of local driving before I get back to my house.
I hit 35.0mpg before I exited the highway.
Regarding the accuracy of the fuel economy reading. I'd say there's a 1.0mpg maximum margin of error. It's usually within a 0.5mpg proximity.
I hit 35.0mpg before I exited the highway.
Regarding the accuracy of the fuel economy reading. I'd say there's a 1.0mpg maximum margin of error. It's usually within a 0.5mpg proximity.
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