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But my 2 GM auto's coast same OD or Neutral, isn't the point of P&G to be efficient you need to get engine load fairly high 70%+ but RPM's low, the GM's unlock at lower rpm before I can ever load them in drive or OD unless rpms are way up.
In Sentra's data collecting (only one car) P&G at 70% load with EOC to roughly match constant speed. He had to go higher load still with EOC to get better than constant speed. With my auto GM's and I highly suspect a Cruze it's impossible to get better than 70% load in top gear without going 90 mph, I doubt I can get 40% at 2,000 rpm without downshifting.
I believe your honda's lack of free wheeling is why P&G does better than constant speed. Both the malibu and Impala drop to 1000 rpm when going down hill and will pick up speed.
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