You may need to adjust your Cutoff setting on the Scangauge. Using LOOP to verify when DFCO is happening can help fine-tune it. You want closed loop under normal driving. For DFCO it should show Open Loop. No fuel, so no need to monitor the exhaust mix.
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11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
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