So you're slowing down for a red light/stop sign in your manual fit...


do you..

a)throw it in neutral

or

b)leave it in gear until you stop

?

which is better for mpg as well as longetivity of the tranny?

 

coasting in gear>coasting in neutral

 

reasoning?

 

As recorded in other threads, the ScanGauge shows that the injectors are shut off when coasting in gear above 1500 rpm. When in neutral, the rpm drops to idle, and the injectors pump fuel to keep the engine from dying.

Coasting in gear FTW!

--Barry

 

as i stated on HT, coasting in gear cuts fuel. so better mileage. coasting in neutral runs the car at IDLE. using fuel.

 

Yes but there are other factors involved that favor neutral.

 

FAS, do a rolling stop and pop the clutch to keep going.

 

Like THAT won't wear the crap out of your clutch...

 

Does the main shaft in the manual tranny have any lubrication issues if you coast in nuetral?
I know some trannys do not like coasting with the clutch in.

 

any more info on this?

 

Are you suggesting that when we coast in N, that we hold the clutch pedal down?

I just shift to Neutral then clutch out.

Engine wear is the big factor, as far as I know. Correct me if I'm wrong.

 

How do you coast but keep the RPM's above 1500?

 

dont drive 10 MPH in 5th gear LOL

 

Coasting in gear is also known as DFCO (Deceleraion Fuel Cut-Off), it's a feature of the engine management, so it was consciously designed by the manufacturer to work this way. And the reasoning makes sense, why use fuel when you have the car's momentum to keep you going?

You can also use it when going down hills, just like engine braking, really.

We have a real fuel efficiency guru on our forum, he's done a good writeup about this, if you want to check it out:

Using DFCO to increase your MPG - Toyota Yaris Forums - Ultimate Yaris Enthusiast Site

mods, if this is not cool please feel free to remove this post, but I'm sure everyone likes to know a new trick to help save fuel/money

 

coast in gear not only to save fuel, but you still have immediate control
to manuver your car in case you need to.

i typically h&t down to 3rd, but at times down to 2nd approaching a
stop when i need slightly more braking power. i just under blip on
purpose for those instances.

 

Sorry, I just re-read the OP's topic, and realized that i misunderstood the topic for some reason. -Ooops.

 

That pretty much sums it up. Also for the transmission too.

 

The poll isn't really valid since it depends what's "up ahead". If you are planning to come to a stop then leave it in gear, using DFCO. If you expect to re-accelerate then neutral preserves momentum. Whichever keeps you from using either pedal the most.

 

Many hypermilers have been doing that for thousands of miles with no problems. If you are smooth, it's no more wear than starting off from a stop.

 

Does the AT fit also shut off the fuel when coasting in gear?
When can I go to find out what all the acroynms are FAS, P&G?