I also have a 2000 Accord (V6) automatic and have great trouble beating EPA. Tires at 44 psi. I can go to DFCO easily when above 2000 rpm. There are other tricks I use to get to DFCO below 2000. Read mpg on Scangage II and it will read 9999 when in DFCO. When the rpm drops to 1200 I lose DFCO, so at 1300 rpm I down shift from D4 to D3 and when I reach 1300 rpm again I drop to 2 and even to 1 and stay in DFCO all the way to the stop sign.
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