Quote:
Originally Posted by JockoT
But which one is right?
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The Insight's built-in gauge tracks actual mpg calculated from fillups & distance pretty closely, and miles by odometer is as accurate as I can measure. And what it displays seems reasonable, vs the SG's sometimes wildly unreasonable values. As (IIRC here) showing 100 mpg going up a hill where the Insight shows 50, then showing 50 down the other side where the Insight's display is pegged at 150, and the SG is showing it's in DFCO.
PS: I do have an SG that dates from about 2004 or so, soon after I got the car. Recent versions could do a better job. And my examples are from memory of the first year or so - I haven't used the mpg stuff since.