Have found none of the mpg results compiled by the car company on board computers are accurate.
Do it the right way by dividing miles driven on a tank by gallons needed to fill it again and you will get true mpg.
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I've checked it it's damn close.
~Molɔ̀ːn Labé Skýla~ As Bob Hagel would say"You should not use a rifle that will kill an animal when everything goes right; you should use one that will do the job when everything goes wrong."Good words of wisdom...............