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Personally I normally drive ~35-40mph since #1 I don't EOC due to it being night time, #2 my auto trans won't shift into overdrive/lockup till it warms up some. 35-40mph is around 30mpg for warmup, at 45 on up mileage just drops off a cliff. P&G on the way home with EOC seems to be MUCH better than my old methods ^.^.
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