Quote:
Originally Posted by OWL
Drafting and 55MPH with 50# tire pressure and belly pan.
The scan-gauge shows 45mpg total fuel efficiency. Calculator at the pump 34mpg.
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Then your getting 34mpg.
Not sure what screen "total fuel efficiency" is.
If your scan gauge is properly adjusted, then your scan gauge mpg and hand calculated mpg will be within 10% of each other.