I guess my confusion is not understanding the fine line between lugging and low, but acceptable, engine speed.
I understand that throttle position plays a major role here, in that a speed of X in OD may be fine with light throttle, but lugging with say 20% throttle.
However, I can't seem to find the spot where I say 'okay, this is about the low end of my vehicle's threshold for level terrain.'
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EcoDriving: Turning more fuel into usable forward motion.
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