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Old 03-14-2010, 12:57 PM   #17 (permalink)
RobertSmalls
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Quote:
Originally Posted by thatguitarguy View Post
I don't know that staying in D at a light necessarily uses more fuel than N. After all, you haven't changed the throttle position, and the engine is turning at a lower RPM.
I haven't studied it scientifically. I do know, though, that the Scangauge reports the 2010 Accord idles on 25% less fuel in N than in D. Has anyone else with a ScanGauge and an automatic compared gph in N vs D?

I also know that Chevy trucks with the 4AT require much less brake pedal effort when gently braking to a stop in N instead of D. Therefore, the engine is using more fuel and producing more torque in D than N.
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