Leaving car in neutral when going down a long hill.will this save petrol? dont tell me its not safe!?
Answers:
yes, you would save petrol because the engine isnt running
no, it wont save petrol. and putting a car into neutral while driving, you can overshoot and slam it into reverse.
not good for the transmission.
I think this will save petrol but the amount of petrol this will save will be negligible.
It won't make a difference unless you shut off the engine, which will take away your power steering and power brakes (very dangerous).
Not really very much. And if your car is an Auto trans you can damage the trans. And its not safe. (had to)
A TINY amount. You car will idle anyway when going down a steep hill, as you won't be accelerating. Putting it in neutral just "forces" idle as it were. Your engine running doing nothing will still burn some fuel. If you cut your ignition going down a hill then it would save fuel - but it's probably not worth the effort.
No it will not save gas. And since you mentioned it, it extremely dangerous, due to the fact, the transmission is used to slow the vehicle down.
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just put it in a lower gear.it will save your brakes.unless it's like a 15 mile hill fuel won't be that big a deal, I drive buses, and it works well.
Very minutely as the engine is ticking over, and I will not tell you it is dangerous, ok, now go and try it on a hair pin in Italy and let me know how you get on.
Have you any idea of how dangerous it is though.
Your brakes don't work proprly.
If you crash into someone's daughter doing this silly little boys trick then you will be tortured and killed by their parents.
Rightly so
no idiling so it doesn't matter
Yes, it will save fuel, because your engine is only idling, using very little fuel while doing so. But your engine IS running. And if you're driving a manual transmission, you don't have to risk putting it into a missed gear, just put the clutch pedal in, tada neutral.
And in most cars, it's almost impossible to put it in reverse while you're moving forward at anything more than a few mph/kph.
I think I've successfully debunked the other two guys. carry on. :)
Well it isn't safe as you are not in full control of the vehicle.
And it will use more petrol than if you just leave it in gear and take your foot off the accelerater.
Modern fuel systems use no petrol at all when coasting in gear as the torque from the wheels keep the engine running but if you dip the clutch the system has to inject more fuel to stop the engine from stalling.
since you dont care if its not safe you shouldnt drive. buy a bicycle or a skate board then fall off and break your neck so you dont get behind the wheel ever again and potentially hurt someone else.
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No. Like the other answers said, your engine is still running. But you're adding uneccessary wear and tear on your clutch or automatic transmission. Besides, it's usually MUCH MORE SAFE to leave the vehicle in gear so the engine can provide braking assistance when going down long or steep hills.
Yes it will save petrol but at what cost.You will be breaking the law. You are not in full control of your car and if your breaks fail you are well and truly up the creek without a paddle. You are supposed to be in full control of your car and not have or do anything to distract your attention. That includes putting your car into neutral to try and save a piddling amount of petrol. If you can't afford the petrol you shouldn't be driving.
Wow most of these people are retarded. It is perfectly safe however it really won't save any fuel unless you can shut the motor off. Even though the RPM's are higher, it is not using any more gas than an idling motor would. Shifting into a lower gear is a good idea as it does help brake the vehicle.
Rover used to incorporate a free wheeling device in their cars years ago. At that time there was not so much traffic about, now any arsehole can get a car so although it does save petrol and does not harm the transmission in a manual gearbox car, it's not safe.
sorry but its not safe as there is no engine braking and its free wheeling please stop.
Idling/coasting in Neutral uses the same gas as low/1st.
While your foot is off the gas, your air/fuel mix is very low in 1st gear, so while your revs are higher due to the transmission being engaged, there isn't any extra gas usage. And you're using 'Engine Braking' to assist your descent.
You don't place wear on your clutch by being in neutral, but if you're revs don't match your wheel speed when you re-enter 1st you will place extra wear on your clutch.
bottom line - THAT"S WHAT LOW IS FOR!
Just leave your foot off the gas. And as for safe just wait til your brakes fail on a downhill slope and then you'll be glad of the gears matey
No it will not as the engine is still running. This is unsafe practice as you have not got control of the vehicle. Look in the highway code for further information.
I was always told that it did save petrol and did it many a time myself when pennies were few. However, is it really worth it, because it is only a pittance and although you say not to mention it, it really is very dangerous.
Maybe a little bit, but the engine will still need fuel to keep it turning.
If you select the highest possible gear, and "coast" in gear, the momentum from the car travelling down the hill will turn the engine, so it won't need any fuel at all to keep it turning (depending on the type of engine it may still use some, but not much - a modern electronically controlled diesel, or a late 80s/early 90s, non-catalyst-equipped electronically injected petrol will use the least).
Bear in mind that if you need to hold the speed back, or even reduce it using the brakes, you have to balance to cost saving in fuel with the additional cost of wear on the brakes.
Therefore the most efficient way to coast down the hill is in the gear that allows you to keep your feet off both accelerator and brake. However for safety you should keep your foot hovered over the brake in case of an emergency, as you won't have any engine braking in reserve.
yes of course it will save petrol, not a lot tho, it would have to be a really big Hill for U to notice the saving.
just putting it into neutral, is not that unsafe, its safer than turning the engine off and rolling, as someone else said, U lose power steering, and Ur brake efficiency goes way down.
No it won't save you fuel, but it could get you killed!!
it's illegal
how mean can u get it saves one tenth of a penny but puts you in peril as you ave no control if somone was going to drive into you
get real and drive properly
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