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ok so I began driving in P400, EDC comfort, and D2 and I'm getting about 15.5 mpg on average. 100% city driving with a lot of stop and go.

now what can I do to improve mpg?

(yes, I know this car is not about fuel efficiency but sometimes I just want to drive without having to worry about refueling every week)

EDIT: I'm talking about the mpg displayed on the tachometer not idrive. I noticed that idrive sometimes give 29~30 mpg so I don't believe it...

Trade your car in for a Prius. Now.
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