Join Date: Jun 2004
Location: On the glideslope...
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|Also, coasting to a near stop in a high gear means very low RPMs, which actually uses fuel. According to the service manual, fuel is cut when RPM is above 1800 and there is no load on the engine (foot off the gas pedal). Fuel flow begins again when RPM drops to 1500 to prevent a sub-idle condition.|
I have my doubts about the assertion that clutch in hurts your gas milage. Yes, fuel is needed to keep idle in neutral, but it can't possibly be much. On the other hand, you drastically extend the cruise distance when in neutral. In my Miata I've come pretty close to a mile a couple time, I can't do that with the clutch engaged. The reality is that every unit of gasoline contains so much energy, whether you spend it initially (keeping revs up longer to lift off the gas later), or through the process (cruising at neutral), my suspicion is that you use almost the exact same amount (if I get really bored later, I'll come up with an energy balance).
I believe someone on another site saw gains by using the throttle like an on/off switch at WOT/full closed, and saw gains, but I didn't read to much of the post.
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