Wondering why anyone would think that the fuel gauge was any indication whatsoever to the mpg your car was getting? That's a new one to me....


Unless any reported mpg calculation can be quantified with 100% of the control points and scientific data points to reflect exactly how that conclusion was arrived at, and why it was accurate - well, it's an exercise in non-scientific seat-of-the-pants raw data, and suppositions.

The closest mpg calculations I've read have to do with defined and controlled test conditions - not one mpg test like that has ever been done on this forum to my knowledge.

The only way to control most all those variables as well as define them aren't going to be on any public domain, driving in a variable, non-scientific cross country manner.

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'06 E320 CDI
'17 Corvette Stingray Vert