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I have 3,800 miles on my L99/A6 and just checked my mpg using the DIC on a 100 mile trip on I-90 in NYS. I have been noticing the mpg getting better with more miles on the car. Today I got 26.2 mpg during the run with cruise set at 70 and temp outside at 78 degrees. In town my mpg drops in a hurry. I get anywhere from 21.5 to 24 in combo driving and around 20 in the city. One thing I have noticed is that for good mileage you need to keep the car in Auto. If you use the Sport mode you really notice the reduction in mpg.
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