Can you put auto to N while driving?
#16
That may be true but while costing in gear, the fuel that it is still burning is no more than what it would be burning while the engine is idling while the transmission is coasting in neutral. So to be popping it into neutral to save fuel isnt going to help or be noticeable either way.
#17
That may be true but while costing in gear, the fuel that it is still burning is no more than what it would be burning while the engine is idling while the transmission is coasting in neutral. So to be popping it into neutral to save fuel isnt going to help or be noticeable either way.
For example if the goal was 25 mph and you were doing 50 mph then you could take longer to get to 25 mph by placing the car in neutral. If you left it in drive it would coast down faster to 25 mph and then you would have to add gas a little earlier to maintain 25 mph.
So while it may save a little gas, to me it has disadvantages as well that for nearly everyone offsets any possible benefits.
I think most hypermilers would state that the most important factor is maintaining average speed for the conditions. For example instead of stop and go in a traffic jam you maintain the average speed that the traffic actually moves forward so you are neither accelerating or braking (unlike how most of us do it). Not only do you save fuel but so does everyone around you.
#18
No.
Just wrong. Automatic Transmissions have been around since far before computers. Fluid controls everything in your transmission. It's basically a series of hydraulic lines and pumps that control a set of planetary gears.
Don't just make stuff up you don't know about.http://auto.howstuffworks.com/automa...ansmission.htm
Just wrong. Automatic Transmissions have been around since far before computers. Fluid controls everything in your transmission. It's basically a series of hydraulic lines and pumps that control a set of planetary gears.
Don't just make stuff up you don't know about.http://auto.howstuffworks.com/automa...ansmission.htm
#19
Until you get to a certain point there is no fuel going to the motor. Now, I do not know what point that is but I do know there is NO fuel. I said in my previous post I have an air/fuel gauge and it tells me how much fuel there is to air. When there is no fuel going through and just air, it reads "---". When coasting it reads "---" therefore no fuel is going in the motor.
pfarmer, you mentioned in your post about stop and go traffic. I am not referring to stop and go traffic, I am referring to coming off of high speeds where the revs are at least 2,500. Of course you are going to burn fuel sitting in traffic and stopping and going. But coasting from high way speeds will save fuel. I believe Jeremy from Top Gear even stated in an episode that the modern engine burns no fuel when coasting.
pfarmer, you mentioned in your post about stop and go traffic. I am not referring to stop and go traffic, I am referring to coming off of high speeds where the revs are at least 2,500. Of course you are going to burn fuel sitting in traffic and stopping and going. But coasting from high way speeds will save fuel. I believe Jeremy from Top Gear even stated in an episode that the modern engine burns no fuel when coasting.
#20
I had a 94 Ford Taurus SHO that used to pi$$ through brakes two to three times a year.
The dealer told me that the only way to slow down this rediculous brake wear was to pop the car into nuetral whenever I was braking.
I thought this was a pretty lame solution but they claim that even at an idle, the engine pushed the car much more than when in nuetral, and this in turn would help to save my brakes.
I never did it... too much of a hassle and I ended up getting rid of the car about a year later. Damn thing passed everything but a repair station.
The dealer told me that the only way to slow down this rediculous brake wear was to pop the car into nuetral whenever I was braking.
I thought this was a pretty lame solution but they claim that even at an idle, the engine pushed the car much more than when in nuetral, and this in turn would help to save my brakes.
I never did it... too much of a hassle and I ended up getting rid of the car about a year later. Damn thing passed everything but a repair station.
#21
Until you get to a certain point there is no fuel going to the motor. Now, I do not know what point that is but I do know there is NO fuel. I said in my previous post I have an air/fuel gauge and it tells me how much fuel there is to air. When there is no fuel going through and just air, it reads "---". When coasting it reads "---" therefore no fuel is going in the motor.
pfarmer, you mentioned in your post about stop and go traffic. I am not referring to stop and go traffic, I am referring to coming off of high speeds where the revs are at least 2,500. Of course you are going to burn fuel sitting in traffic and stopping and going. But coasting from high way speeds will save fuel. I believe Jeremy from Top Gear even stated in an episode that the modern engine burns no fuel when coasting.
pfarmer, you mentioned in your post about stop and go traffic. I am not referring to stop and go traffic, I am referring to coming off of high speeds where the revs are at least 2,500. Of course you are going to burn fuel sitting in traffic and stopping and going. But coasting from high way speeds will save fuel. I believe Jeremy from Top Gear even stated in an episode that the modern engine burns no fuel when coasting.
#22
I think what they're trying to say is that in a modern engine, at idol, it uses almost no fuel.
#23
you know exactly what i meant. Computer controlled automatic transmissions did not come around until the last few decades.
#24
Of course, coasting on high way in N is not a good thing to do. But in a situation there is a traffic ahead, it is better to shift it into N and let the car goes by itself until you need to stop or give it some gas to speed up (the gear is putting back to D).
#25
You said what I want to say.
Of course, coasting on high way in N is not a good thing to do. But in a situation there is a traffic ahead, it is better to shift it into N and let the car goes by itself until you need to stop or give it some gas to speed up (the gear is putting back to D).
Of course, coasting on high way in N is not a good thing to do. But in a situation there is a traffic ahead, it is better to shift it into N and let the car goes by itself until you need to stop or give it some gas to speed up (the gear is putting back to D).
#26
Until you get to a certain point there is no fuel going to the motor. Now, I do not know what point that is but I do know there is NO fuel. I said in my previous post I have an air/fuel gauge and it tells me how much fuel there is to air. When there is no fuel going through and just air, it reads "---". When coasting it reads "---" therefore no fuel is going in the motor.
pfarmer, you mentioned in your post about stop and go traffic. I am not referring to stop and go traffic, I am referring to coming off of high speeds where the revs are at least 2,500. Of course you are going to burn fuel sitting in traffic and stopping and going. But coasting from high way speeds will save fuel. I believe Jeremy from Top Gear even stated in an episode that the modern engine burns no fuel when coasting.
pfarmer, you mentioned in your post about stop and go traffic. I am not referring to stop and go traffic, I am referring to coming off of high speeds where the revs are at least 2,500. Of course you are going to burn fuel sitting in traffic and stopping and going. But coasting from high way speeds will save fuel. I believe Jeremy from Top Gear even stated in an episode that the modern engine burns no fuel when coasting.
If your gauge sees what it thinks is no fuel with a closed loop it will most likely error out on an a/f gauge since it can not divide by zero. Simply displaying ---- doesn't mean the engine is not burning fuel, it means the gauge can't compute the value with the parameters present.
Even if it wasn't burning fuel during a coast versus putting in neutral, neutral would probably still win in the gas use race since the minimum amount of fuel burned is less than what is now being wasted by engine braking. The difference being how far can you coast from lets say 60 to 50 using engine braking versus neutral with no engine braking. Still doesn't mean it is a good idea.
#27
So while I know that you meant totally computer control auto, various elements existed much earlier. Still not really a good idea to shift into neutral to save two drops of petro. In some cases even power steering will not function the same at idle as it does at normal rpms at a given speed. If the car stalls other issues come into play as well.
#28
I tap my + paddle quite often during long downhills or if I am decelerating onto my driveway or stop sign. This holds 5th longer than leaving it alone, so in downhills where you would be in 5th anyway it does not gain anything. I feel a noticeable reduction in engine drag at speeds around 30-45MPH. Not sure if it really saves anything. It might be an alternative to going N.
#29
I tap my + paddle quite often during long downhills or if I am decelerating onto my driveway or stop sign. This holds 5th longer than leaving it alone, so in downhills where you would be in 5th anyway it does not gain anything. I feel a noticeable reduction in engine drag at speeds around 30-45MPH. Not sure if it really saves anything. It might be an alternative to going N.
#30
![Dunno](https://g35driver.com/forums/images/smilies/dunno.gif)
Last edited by kregg; 09-25-2009 at 04:17 PM.