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Originally Posted by Da Klugs
Have read the same things re neutral. Not the case on my Audi. Runs at 1100-1200 RPM while in gear and I think the AWD comes into play re the efficiency. In neutral, drops to 800 rpm. Huge difference in the Mpg and the "feel".
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Quote:
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Originally Posted by Sancho
This is somewhat more of an instance than the rule, many transmissions dont freewheel while in gear and the slipping is taken up hydraulically etc.
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From what I've read, the tranny doesn't freewheels (if I understand what you mean) -- The wife's subaru's RPM is still "normal" for the speed it's going in gear, but like I said it pegs the MPG readout. Moving to actual neutral does drop the RPM to 800 or so, but the MPG readout reads much less.
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According to this short article your car actually uses no fuel whatsoever while coasting in gear.)
I don't know for sure, just reporting what I've read. I'm not a mechanic -- I can understand a manual tranny, but automatic transmissions might as well be magic to me.
And just for giggles,
here's an article from Road & Track regarding gas saving tips and myths.