eco mode

[GENNY429]

I wouldn’t recommend coasting in neutral downhill. In many states it is illegal. Then there is the safety issue of placing extra load on the brakes with the possibility of over heating. Also potentially loss of control.

In addition, if you stay in gear and let off the gas pedal while the engine speed is above idle, as would typically be the case on a long downhill, the engine will cut off fuel to combustion chambers so that you are using no gas. Because you are in gear, the wheels will keep turning the engine so that it doesn’t stall.

If you are in neutral, the wheels will not turn the engine, so the engine has to send fuel to the combustion chambers to maintain idle RPM so that the engine doesn’t stall.

Lots of articles discouraging the use of this technique.

I stand corrected. I read up on the topic and YOU ARE RIGHT. Thanks fo the info. I never knew this. Guess I'm living in a carbuerated world.

 

[EdP]

. You just put it back in drive and continue on. I have NEVER heard of this being illegal and I have lived in a bunch of states. Also, how would they know?

New York Statues, Vehicle and Traffic Law, Section 1216]: Coasting prohibited. The driver of any motor vehicle when traveling upon a down grade shall not coast with the gears of such vehicle in neutral, nor with the clutch disengaged.

Washington
RCW 46.61.630
Coasting prohibited.

(1) The driver of any motor vehicle when traveling upon a down grade shall not coast with the gears of such vehicle in neutral.

Rhode Island 31-22-6
Coasting prohibited.

Some good news, Minnesota repealed the law a few years ago.

Note there are differences between fuel injected and carbureted cars.
Does Shifting Into Neutral Really Help Fuel Economy?