Hypermiling – An effective way to save fuel

Coasting is equally important. When approaching a red light or a planned stop, lift your foot off the pedal and let the car’s momentum finish the last few metres of the journey instead of continuing to accelerate and then slamming on brakes.

On newer models, the vehicle should be kept in gear to essentially get “free” mileage since the fuel injectors are closed if there is no one pressing the throttle, and, therefore, no petrol is used to coast.

In contrast, putting the car in neutral or keeping the clutch depressed will see the engine idle and use more fuel than if it were in gear.
And this places more strain and therefore more wear on CV joints, gearbox and diff. Nothing is free.
 
Physics. A body in motion has inertia. Think about it.
Ja and? The very same mechanic process happens when a car is accelerating under power, only with a lot more energy being put in and the inertial load acting the opposite way . Let's say you decelerate without clutch. Your engine now acts as a resistance of sorts decelerating the car, but the drive train is not nearly under the same mechanical stresses as hard acceleration. Maybe if you try to use your poor engine as a Jake brake and try to stop using only that, sure (for instance going 5, 3, 1 and not braking at all).

Normal coasting, nah, although it is annoying as **** to have someone in front of me coast to the stopsign from 100m away
You have gears and brakes, use them
 
Ja and? The very same mechanic process happens when a car is accelerating under power, only with a lot more energy being put in and the inertial load acting the opposite way . Let's say you decelerate without clutch. Your engine now acts as a resistance of sorts decelerating the car, but the drive train is not nearly under the same mechanical stresses as hard acceleration. Maybe if you try to use your poor engine as a Jake brake and try to stop using only that, sure (for instance going 5, 3, 1 and not braking at all).

Normal coasting, nah, although it is annoying as **** to have someone in front of me coast to the stopsign from 100m away
You have gears and brakes, use them
Gears & drivetrain are expensive.
Brakes are cheap.

Use your head, your wallet will thank you.
 
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