I Don't Think My Yaris Has DFCO

[Chris07LB]

Thanks for the info, Ill be sure to look into the site a little more.

Side not, you ever try doing 55mph even in the slow lane in NEW JERSEY??? Aint gonna happen!!

Originally Posted by BailOut

As you mentioned that is the average speed, taking into account city and highway driving (30-35 MPH in the city, 55-60 MPH highway). The reality of my daily commute is a twisting, winding, 2 lane, 30-50 MPH climb over a 4,500ft mountain (8,900ft summit), dropping 2,500ft on the back side, then the opposite on the way home. That is very far from optimal mileage conditions, especially in the colder months.

If you want to get better MPG on the highway the #1 thing you can do to help yourself is to slow down. Every MPH you drive over 55 takes away 1% of your fuel efficiency, and every MPH above 65 takes away as much as 5% due to the physics of aerodynamics. A common example used is that it takes an average of 20% more fuel to drive 70 than it does to drive 55. Get in the right-hand lane and stick to 55 MPH and watch your MPG shoot up.

Pumping up your tires to at least the max sidewall rating not only improves handling on wet and dry pavement but also increases MPG by decreasing rolling resistance, and increases the life of your tires by producing a much more even tread wear pattern. As an example I run my RE92's at 60 PSI for most of the year, dropping them to 44 PSI (which is the max sidewall) in snowy conditions.

Btw, the site linked in my sig, CleanMPG.com, isn't mine. I'm just a member and contributor. You can read much more about increasing your MPG there, and start logging your own fuel usage if you like.

[d2dailly]

Originally Posted by Chris07LB

Thanks for the info, Ill be sure to look into the site a little more.

Side not, you ever try doing 55mph even in the slow lane in NEW JERSEY??? Aint gonna happen!!

i feel ya. i am always doing about 80 in the fast lane but when i get people up my ass i hit 100 or 110 lol NJ has very aggressive drivers. guess thats why insurance is so high here

[Kaotic Lazagna]

Originally Posted by d2dailly

i feel ya. i am always doing about 80 in the fast lane but when i get people up my ass i hit 100 or 110 lol NJ has very aggressive drivers. guess thats why insurance is so high here

wow, the fastest i've ever driven in my Yaris was 85 mph. LA also has some aggressive drivers.

[BailOut]

I hear you, CASTREX, and all I can say is this:

1) None of those articles ever took rolling resistance into account.

2) None of those articles looked at actual tire longevity.

3) These articles are usually written by the same folks that swear to this day that you absolutely must change your oil every 3,000 miles when Toyota says 5,000 - 7,500 (depending on the engine) and extended synthetics say 12,000 - 15,000.

4) Very few writers, or the organizations behind them, do their own science. They simply mimic what has been published elsewhere.

5) Don't forget that pumping the tires up higher greatly extends tire life so it goes directly against the interests of tire companies, tire sellers and tire installers to have you use a higher PSI.

6) Try it for yourself rather than letting others make the decision for you. However, if you don't want to pump up your tires you certainly don't have to. Like all other hypermiling facets it is left to personal taste.


Just know that Prius owners typically run around at 42/40 PSI on tires that are listed for 35 and several of us on CleanMPG.com are running around at 50+ not only without problems but with many tangible benefits.

[churp]

Pumping tires up higher than normal wears the center of the tread out faster, underinflated wears the outer edges of the tire out...at least with normal matched wheel and tread width. Granted the Yaris is light so wear will take a long time to show.

Sorry Bailout but I value my life more than a couple miles per gallon....in the midwest you won't catch me doing 55 in a 55 limit, I'd get run off the road...and in the 75 zones, 75 to 80 is a safe feeling.

[El Jefe]

i guess thats my problem....i can't drive 55.....LoL

[Astroman]

Ok, I'm a little fuzzy still on how to use DFCO. (I have an automatic.) So all I have to do is take it out of overdrive, put it into "3" and not press the gas pedal while say, going down a hill? Or do I have to put the key in the "acc" position and follow those steps? Forgive me for my ignorance.... I read through every single post on this and I'm just not 100% certain.... Thanks!

[BailOut]

Astroman:

There is no need to touch the ignition control. Just put the transmission in 3 or L and let your foot off the accelerator.

[Astroman]

Originally Posted by BailOut

Astroman:

There is no need to touch the ignition control. Just put the transmission in 3 or L and let your foot off the accelerator.

Thanks! That was very helpful and quite simple.

[Pavel Olavich]

Originally Posted by BailOut

Astroman:

There is no need to touch the ignition control. Just put the transmission in 3 or L and let your foot off the accelerator.

BailOut is correct! The A/T Yaris uses Grade-Logic (sorry to use a Honda term), and it works great, but I often manually shift to 3 and 2 to take advantage of (1) DFCO and (2) engine braking to save the old brakes.