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Old 09-28-2013, 06:23 AM   #1
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"New" 2000 honda Civic

So I just traded in my 2005 GMC Yukon (averaging 17 mpg) for a 2000 honda ex coupe with a stick, what should I look for as far as maintenance in order to get better mpg?

First off I plan on getting rid of the ricer exhaust and 17" racer boy wheels, that should help a little.

But just wanted some outside input, thanks.
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Old 09-28-2013, 07:55 AM   #2
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Remove excess weight, get some low rolling resistance tyres and service the car, new spark plugs, oil and air filter should help. Glad it's a manual, now YOU can drive the car properly!
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Old 09-28-2013, 09:52 AM   #3
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Thanks, that's exactly the sort of stuff I was looking for!
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Old 09-28-2013, 05:25 PM   #4
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The way you drive will help more than any mods though. Use the gears properly and you should only need to change gear once when getting up to speed. Pull away in 2nd, then switch to 5th at 30 mph, then gently cruise to around 56 MPH for maximum economy. When approaching junctions, lights or going down hills, put it in neutral and coast.

You should see close to 50 MPG perhaps?
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Old 09-30-2013, 12:30 AM   #5
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I point out a couple of small things. One, coasting in Neutral or with clutch depressed means the engine control system will inject fuel to keep the engine running. If you coast in gear, the fuel injection will shut the fuel off completely since the inertia of the car keeps the engine turning. At best coasting in Neutral will be a wash.

And two, in many places coasting in Neutral is illegal. It isn't likely you would get caught, though.

Doing a little searching reveals that gasoline engines run most efficiently with near wide-open throttle. That being the case, a "jack-rabbit" start can actually use less fuel than a slow acceleration. Make your own decisions, but take Internet advise with more than a few grains of salt.
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Old 09-30-2013, 05:58 AM   #6
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Ive been experimenting, depending how big a hill it is, its way more efficient to coast in neutral as the car accelerates rather than being slowed by the engine braking. I can travel 6 miles in neutral on a certain stretch locally!
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Old 09-30-2013, 11:35 PM   #7
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>One, coasting in Neutral or with clutch depressed means the

>engine control system will inject fuel to keep the engine running.

>If you coast in gear, the fuel injection will shut the fuel off

>completely since the inertia of the car keeps the engine turning.

>At best coasting in Neutral will be a wash.

At least on a diesel, the engine-braking effect of staying in gear at higher rpms costs more kinetic energy than you save. So it is often best to be in neutral (unless you want to slow down, in which case you should stay in gear to use the engine-braking).

I have no idea about petrol engines.
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Old 10-01-2013, 11:59 AM   #8
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Since Diesels have no throttle (the intake is always completely open) they have very little engine braking anyway. That's why compression brakes (Jake Brakes) exist on trucks. I expect Diesels, like petrol engines, cut the fuel off completely on throttle overrun, just as petrol engines do, and inject fuel to keep the engine running when in Neutral. It still does not address the issue of coasting in Neutral being illegal in many places.
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Old 10-02-2013, 02:19 AM   #9
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Drink driving is also illigal, but 4 people every hour are still killed in America by a drink driver
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Old 10-02-2013, 05:37 AM   #10
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"Drink driving" is a new one on me. I have heard of "DrUnk driving." Please cite a source for that statistic. Four per hour comes to 35,000 per year, and last I heard that is more than the total people killed in traffic per year.
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