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The cutoff is a "Combined MPG" of 22.5mpg. The EPA's Combined MPG is basically the average of city and highway with an adjustment. The '08 SRT-8 rated at 13-18mpg gets a "Combined MPG" of 19.1.
So if the A6 w/o AFM was rated to 21 or 22mpg highway, it still might not have gotten the tax. But it certainly is more appealing to perspective buyers at 26 highway.
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2SS/RS - Black/Black - CGM Rally Stripes - Auto - VIN 10171
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