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The engine shuts off at below 10 mph if my foot is even toughing the brake, so I don't know that the kill switch is necessary. As for instantaneous mpg, you have to get the navigation to get that; ours doesn't. I'm stuck with trip mpg. City mpg is better than it should be for a 240 hp v6 because of auto stop and IMA, but virtually ANY acceleration that is not gravity-aided will throw it out of ECO. That's why I was wondering if I am better off accelerating more quickly and getting back to ECO sooner.
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