Toyota Yaris Forums - Ultimate Yaris Enthusiast Site
 

 


 
Go Back   Toyota Yaris Forums - Ultimate Yaris Enthusiast Site > Second Generation Toyota Yaris Main Rooms > Fuel Economy Forum
  The Tire Rack

Reply
 
Thread Tools Display Modes
Old 05-25-2009, 07:32 AM   #1
YarisOwnersDad
Is now a Corolla S Owner
 
Drives: 2010 Corolla S
Join Date: Mar 2009
Location: Western Kentucky
Posts: 460
Cruise control vs MPG

I got about a gazillion hits on "cruise control" when I did a search to see if this subject has been covered in here. If it has, then it won't hurt my feelings if one of the mods wants to delete this thread.

What I would like to know is how much using cruise control costs in terms of gas mileage. I know that a lot would depend on the terrain, since cruise control would attempt to keep the set speed as you go up steep grades, whereas you might allow the car to slow a little if you were using the accelerator pedal.

Does the use of cruise control completely eliminate the use of DFCO, or will the car go into the DFCO mode automatically on downhill grades, even when cruise control is on?

If a guy got let's say 45 MPG on a long trip on fairly level ground while using cruise control, what would you expect that his mileage would have been if he had traveled the same route at the same average speed without the cruise control and without "hyper-mileing?" I guess what I am trying to ask is this: if a guy is not going to hyper-mile, is he just as well off to use cruise control as he would be to avoid cruise control?

Tom
YarisOwnersDad is offline   Reply With Quote
Old 05-25-2009, 11:13 AM   #2
BailOut
Steals terrorist's lunch
 
BailOut's Avatar
 
Drives: 2007 Yaris Liftback
Join Date: Mar 2007
Location: Reno, Nevada, USA
Posts: 1,299
It is difficult at best to measure exactly how much more fuel cruise control uses, but in the testing that hypermilers have done a 5-10% hit is common. This is mostly due to the lateness and level of acceleration used by the cruise control.
__________________
- Brian

Share the Road


I often carry 2 carpool passengers and mountain bikes
or snowboards/skis over a 4,500 foot elevation difference.
Click the graphic above to see my detailed mileage logs.
BailOut is offline   Reply With Quote
Old 05-25-2009, 12:38 PM   #3
yaris-me
Learn to Relax
 
Drives: 2007, Meteorite, LB
Join Date: Dec 2008
Location: Anaheim, CA
Posts: 2,070
You would still have DFCO with cruise control.
yaris-me is offline   Reply With Quote
Old 05-25-2009, 01:15 PM   #4
YarisOwnersDad
Is now a Corolla S Owner
 
Drives: 2010 Corolla S
Join Date: Mar 2009
Location: Western Kentucky
Posts: 460
Quote:
Originally Posted by yaris-me View Post
You would still have DFCO with cruise control.
You mean it would still go into the DFCO mode with the cruise control turned on? Would it go into it as quickly and stay in it as long?

Tom
YarisOwnersDad is offline   Reply With Quote
Old 05-25-2009, 01:51 PM   #5
firemachine69
School'er of hard knocks
 
Drives: Silver Yaris 4dr. HB
Join Date: Oct 2008
Location: Sudbury, On
Posts: 556
For as long as the speed doesn't fall below what the cruise is set at.
firemachine69 is offline   Reply With Quote
Old 05-25-2009, 11:13 PM   #6
Cosworth
 
Drives: S sedan
Join Date: May 2009
Location: MI
Posts: 120
i set the cruise control at a certain speed, and coast or accelerate using the cruise control stem to accommodate the terrain. I don't know how much gas I'm saving by doing this, but as long as I get over 40+ mpg on a long trip, it's so worth it.
Cosworth is offline   Reply With Quote
Old 05-26-2009, 02:26 PM   #7
nsmitchell
 
nsmitchell's Avatar
 
Drives: LB-Auto-PWR-ABS-Cruise-Springs
Join Date: Aug 2006
Location: Richmond, VA
Posts: 1,065
I have the Rostra Cruise control with my Yaris LB Auto. I get around 38MPG on the highway doing about 65MPH. I can easily get better than 38 in the city. The Rostra just tries too hard to keep you at the set speed. I wish there was a way to make it more lenient on the gas when going up hills so it doesn't floor the gas and throw off your MPGs.
__________________
Other car is a 2005 Mustang Convertible 4.0L V6 Manual - Legend Lime
Get YarAss in gear!
RIP - Casey Tatum
nsmitchell is offline   Reply With Quote
Old 05-26-2009, 02:27 PM   #8
nsmitchell
 
nsmitchell's Avatar
 
Drives: LB-Auto-PWR-ABS-Cruise-Springs
Join Date: Aug 2006
Location: Richmond, VA
Posts: 1,065
I do like my cruise control to keep me from getting tickets which can drain your wallet faster than great MPGs can fill it. ;)
__________________
Other car is a 2005 Mustang Convertible 4.0L V6 Manual - Legend Lime
Get YarAss in gear!
RIP - Casey Tatum
nsmitchell is offline   Reply With Quote
Old 05-26-2009, 02:32 PM   #9
BailOut
Steals terrorist's lunch
 
BailOut's Avatar
 
Drives: 2007 Yaris Liftback
Join Date: Mar 2007
Location: Reno, Nevada, USA
Posts: 1,299
Quote:
Originally Posted by nsmitchell View Post
I do like my cruise control to keep me from getting tickets which can drain your wallet faster than great MPGs can fill it. ;)
Paying attention doesn't cost anything at all.
__________________
- Brian

Share the Road


I often carry 2 carpool passengers and mountain bikes
or snowboards/skis over a 4,500 foot elevation difference.
Click the graphic above to see my detailed mileage logs.
BailOut is offline   Reply With Quote
Old 05-26-2009, 02:52 PM   #10
nsmitchell
 
nsmitchell's Avatar
 
Drives: LB-Auto-PWR-ABS-Cruise-Springs
Join Date: Aug 2006
Location: Richmond, VA
Posts: 1,065
Quote:
Originally Posted by BailOut View Post
Paying attention doesn't cost anything at all.
By using cruise I can keep my eyes on the road and not my speedometer...
__________________
Other car is a 2005 Mustang Convertible 4.0L V6 Manual - Legend Lime
Get YarAss in gear!
RIP - Casey Tatum
nsmitchell is offline   Reply With Quote
Old 05-26-2009, 04:18 PM   #11
voodoo22
 
Drives: Yaris Sedan (auto)
Join Date: Jun 2007
Location: Toronto, Ontario
Posts: 545
Quote:
Originally Posted by BailOut View Post
Paying attention doesn't cost anything at all.
Wrong, it's inconvenient and I won't waste my time doing that when I could be texting, reading my email, making a call, adjusting my stereo, browsing my ipod play list or making sure I don't spill my coffee. If you are unimportant, have time to plan your day and be responsible, I guess you're just not as important as I am!
voodoo22 is offline   Reply With Quote
Old 05-28-2009, 05:13 PM   #12
2009Toyotoad
 
Drives: 2009 Yaris 3dr
Join Date: May 2009
Location: California
Posts: 135
Quote:
Originally Posted by voodoo22 View Post
Wrong, it's inconvenient and I won't waste my time doing that when I could be texting, reading my email, making a call, adjusting my stereo, browsing my ipod play list or making sure I don't spill my coffee. If you are unimportant, have time to plan your day and be responsible, I guess you're just not as important as I am!
You forgot checking stock quotes, e-purchasing flowers and takeout dinners on the trip home. Your schedule or Techno toys sound a bit weenie to me.

Last edited by 2009Toyotoad; 05-28-2009 at 05:14 PM. Reason: typo
2009Toyotoad is offline   Reply With Quote
Old 05-28-2009, 06:37 PM   #13
jambo101
 
jambo101's Avatar
 
Drives: yaris 08 sedan
Join Date: Oct 2008
Location: Montreal Canada
Posts: 1,286
I believe you get better gas mileage using cruise because your speed isnt fluctuating,as an example with the cruise off and driving on a level interstate i sometimes find my speed creeping up to 80mph and i find that i'm backing off the throttle frequently.
jambo101 is offline   Reply With Quote
Old 05-28-2009, 06:50 PM   #14
YarisOwnersDad
Is now a Corolla S Owner
 
Drives: 2010 Corolla S
Join Date: Mar 2009
Location: Western Kentucky
Posts: 460
Quote:
Originally Posted by jambo101 View Post
I believe you get better gas mileage using cruise because your speed isnt fluctuating,as an example with the cruise off and driving on a level interstate i sometimes find my speed creeping up to 80mph and i find that i'm backing off the throttle frequently.
Same here. If I don't keep constantly checking my speed and just drive merrily along my way, when I do check my speed, I am often up to 80 MPH, like you say.

I think on level terrain, cruise is a good thing. In hilly country, I think it's best to leave it off, if we want to get better MPG.

Tom
YarisOwnersDad is offline   Reply With Quote
Old 05-29-2009, 09:53 AM   #15
SpaceShot
 
SpaceShot's Avatar
 
Drives: 2008 Yaris 5 speed HB
Join Date: Oct 2008
Location: NH
Posts: 171
I also got the Rostra unit for my LB and for my route of 40 miles interstate and 15 miles country 2 lane, the trip average Mpg was down 1/2 to 1 Mpg. (compared to carefully watching and maintaining my speed)

Years ago after market cruise systems were vacuum driven and could drift as much as 5 Mph, today's units are computer driven and lock in to +/- 1.5 Mph or better. Thus for my route what gets saved in some lower speeds on certain stretches gets eaten up by less coasting.

It's more of a comfort thing for me and 1 of the 2 mods that really didn't pay back.
(The other was smooth racing disc hubcaps, but I still like the look.)
SpaceShot is offline   Reply With Quote
Old 05-29-2009, 03:55 PM   #16
twowheels
 
Drives: '09 Meteorite Metallic 3 dr MT
Join Date: Jan 2009
Location: CA
Posts: 127
Why do people talk like it's all or nothing?

I drive a long straight route using cruise all of the time and use cruise when I want to lock the speed at 55 MPH exactly on the straight/flat sections where I would otherwise tend to let the speed creep up, and cancel it whenever I want to slow down or am on a hill. I never use the resume functionality and instead just get up to the speed that I want and then press "set" again to avoid the fuel blip that you otherwise get. I get high 40s.
twowheels is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY - 2009 Cruise Control for $10, without pulling the steering wheel and airbag CTScott DIY / Maintenance / Service 307 04-04-2023 03:43 AM
Cruise Control - Again! CB900F2 DIY / Maintenance / Service 47 06-17-2010 06:29 PM
Cruise Control chessclubloser DIY / Maintenance / Service 11 03-27-2010 11:59 AM
Cruise Control in the LB RobotMan In Car Entertainment + Electronics (audio / video / alarm) 1 09-30-2007 02:43 PM
Using Cruise control Driver General Yaris / Vitz Discussion 14 11-09-2006 10:12 PM


All times are GMT -4. The time now is 07:41 PM.




YarisWorld
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.