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It uses airflow and calculates fuel flow by stoic ratio. Not the best, especially with varying air/fuel ratios like Tas's TDI, but good enough for standard gas engines. After initial calibration, mine's within 1-2% every time.
This information is from Scangauge, by way of Wayne at Cleanmpg.
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11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
Last edited by PaleMelanesian; 06-06-2008 at 10:50 AM..
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