Same slight fuel usage reported on my 2009 Fit.
I contacted Scangauge about it, suggesting a simple "if rpm = 0, gph = 0, else ....." code change. They replied that it's not a big error so no plan to fix it. This was about a year ago. I hope you have more leverage with them.
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11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
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