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Originally Posted by nbalthaser
i don't think the 1.6mpg had any meaningful affect on the hch.ii database. it was only calculated for 13 miles.
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The average is not weighted based upon miles driven. The fuel economy of every entry is equally weighted regardless of the number of miles driven.
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Originally Posted by Jason
To clarify how the mileage database averages:
For each model, the total fuel economy values for each car are added up and divided by the number of cars in that category. This ensures that each car is given equal consideration. If there is a 20-year-old in Maine who gets 30 MPG over 10,000 miles and a grandpa in California who gets 50 MPG over 100,000 miles, the average is 40 MPG.
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