So you don't have a ScanGauge II. Hmm What r u waiting 4? Quick read!
 

I have a 2013 Ford Fiesta S, which is a 5 speed, and I'm going to quickly tell you what a difference a ScanGauge makes in mileage.

I've got about 25,000 miles on it and bought it new for $13,900.

I've always tracked my mileage tank after tank religiously.

I've always got around 41-42 MPG Hwy & 32-33 around town.

I bought the ScanGauge II and it "modified" my driving habits considerably.

I now an obsessed with the Guage and it's resulting output.

I never knew that the Fiesta shut down the fuel injectors @ anything over 1,500 RPM's with your foot of the throttle. Yes really. That's using no fuel thus no horsepower thus greater gas mileage going downhill in gear rather than coasting in neutral. Did you know that?

With a ScanGauge you learn that and lots more.

I now get, using pen and paper, just over 48 MPG with mostly highway driving.

Moral of the story.... Get a ScanGauge II & the sooner the better.

Good testimonial. Instrumentation makes a huge difference. :thumbup:

So I'm a "Codfish"?
 

CODFISH

Coast On Demand Forced Ignition Shutoff. Same as "EOC" (Engine Off Coasting). A joke acronym made up to poke fun at the ridiculous tendency of hypermilers to create and use an excessive number of acronyms/initialisms. Unfortunately, the person who made it up has since stopped participating in fuel efficiency forums, and taken his sense of humour elsewhere.

This is from the Ecomodder glossary.

*** So... My coasting in gear, downhill, w/rpm's over 1,500 using no fuel is not necessarily a new venture? LOL.

Makes things way more fun too, doesn't it?

It's interesting/amazing how it consumes yo. You try and grasp every tenth of a mile per gallon you can.

I'm addicted. Lol!

I bought a ScanGauge II about a year before I found ecomodder.com. I didn't realize my Mustang had DFCO until I observed 9999 inst MPG on the ScanGauge II. About the time I found ecomodder.com, the ScanGauge II had helped me get my Mustang up to 30 MPG; with more improvements over the last 5 years since I found ecomodder.com. Current lifetime average is 29.9 MPG - 49.5% over EPA combined. :)
Instrumentation is the most important mod because it helps you make the most effective mod: adjusting the nut behind the steering wheel.:thumbup:

My '11 focus has aggressive DFCO.

With the bad motor mounts, I can feel it kicking the engine back on when I'm slowing down in gear.

Sometimes I wonder if instrumentation would improve my fuel economy. :)

I think you know the answer to that!

Be aware that if you are trying to coast, DFCO should be used as a last resort. Why? It all comes down to engine speed. In order to DFCO, the revs have to be above 1500, which takes considerable more energy than idling at 700. Sure, no fuel is being used during DFCO, but it still requires energy, which is provided by the kinetic energy of your coasting vehicle, which was previously provided by gasoline (accelerating up to speed). You can feel the energy loss - the way the vehicle decelerates quicker when you are in DFCO vs neutral coasting.

While it is neat to see DFCO appear on your ScanGauge, the general consensus around here is that if you want the most efficient coast, you do it in neutral, engine idling. Yes, it is still burning fuel, but your vehicle will coast much much further in neutral, and the engine will only need to turn at idle speed. And if the coast is timed correctly, it will actually provide a net savings over DFCO in the end.

Many like myself take it once step further will a kill switch. Long coasts with zero fuel make it even better!

Coasting neutral vs in gear my quick thoughts
 

I only leave it in gear and coast when I would otherwise have to use brakes to maintain posted speed limits, keeping the rpm's above 1,500 in the case of my Fiesta S. The fuel cut off point for it.

Otherwise yes, I coast in neutral always.

An I correct in my thoughts?

I thought DFCO works all the way down to 1000-1100 RPM's in most cars?

Over time, it will become second nature as to whether coasting of DFCO is more appropriate for the given situation.

With my Fiesta specifically.....
 

My car is definitely 1,500 rpm's. I've watched it everyday as I coast in gear downhill to work, I start out less than 1k and as I get momentum thus higher rpm's, the MPG's go to all 99999's at 1,500. Drop below that and the MPG's change quickly to a couple hundred.

1050 RPM's for the Corolla. You can really feel the engine going in & out of DFCO when coasting in 1st gear. Right in line with the UG display.

Pretty much. The only other time I use DFCO is if I know I am going to have to stop.


DFCO operates differently in every car Ive driven. You just need to learn your car.

My car will hold DFCO until idle for that speed so I usually downshift at 850 rpm. I can't get a good enough line of sight to be able to coast to a light EOC but I can in DFCO and have it turn green so I don't use brakes.

and increase speed allowing a longer coast......
i have an Ultraguage, and love it. only way i am able to achieve the numbers i get. also, really easy to reset values after a fill up. and, cost 70.00 shipped.

Yeah, every vehicle Ive driven the DFCO feature works at different rpms. For the insight its down to 0 rpms or auto stop. Most automatics like mentioned 1500 rpms. One nice thing about owning an sg2 and driving different vehicles.

What I like the best is the ability to scan codes and clear check engine lights.

Setting up cost per mile is the second best way to get dirty looks from your passengers vs not using the ac in the summer. :thumbup:

Dirty looks because you are getting thrice the miles per dollar they get?

No, dirty looks as they assume riding in a car was free and then you got a toll like device similar to a cab uses to tell em the fuel cost. :eek:

I got friends who think car ownership is free and all you got to do is pay for fuel. I tellem its a hell of a lot more expensive than that as you got taxes, fee, upkeep, maintenance too. :eek:

But it's just sitting there in the driveway, you might as well use it! :rolleyes: