DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum

Go Back   DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum > Dodge Ram Forum - Mod Zone - Custom Dodge Ram Mods - Dodge Ram Performance > Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 > MDS


Notices

MDS Multi Displacement System Discussion


Latest Vendor News
AutoAnything
Addictive Desert Designs!
United Radio
Bayou Goat Mounts

Reply
 
Thread Tools
  #21  
Old 10-31-2010, 02:42 PM
rtkman's Avatar
rtkman rtkman is offline
Dodge Ram Forum Senior Member!
 
Join Date: Oct 2010
Location: Belleville Ontario Canada
Posts: 607
Gender: Male
Vehicle: 2010 Dodge Ram 1500 Quad Cab
Trim Level: Sport
Color: Black
Rep Power: 5
Rep:167
rtkman has a spectacular aura aboutrtkman has a spectacular aura about
Default

Interesting. I also thought the eco mode was the mds turning on. Shows what I know.
Reply With Quote
  #22  
Old 10-31-2010, 07:55 PM
GTyankee's Avatar
GTyankee GTyankee is online now
Dodge Ram Forum Member

 
Join Date: Dec 2009
Location: San Diego East County, Ca
Posts: 19,022
Gender: Male
Vehicle: 2009 Dodge Ram 1500 2X4
Trim Level: quad cab SLT
Color: sunburst orange pearl
Rep Power: 20
Rep:2615
GTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond repute
Default

you can see the Fuel Saver Light come on at any speed, even well below 30 MPH
the fuel saver indicator light will advise people when they have reached the economy target zone and fuel-saver mode target range.

from everything that i read, if you see the ECO mode indicator displayed, you are in MDS mode

so from what i can tell from reading, not personal knowledge, the ECO mode & MDS may be the same thing.

the Fuel Saver Light is a bit different than ECO mode, although the ECO mode & the Fuel Saver Indicator Light may be on at the same time, under certain conditions
__________________
Ram 1500 SLT Quad cab, 5.7 HEMI(R) MDS VCT, 5 speed auto 545RFE, 3.55 differential gears, 18" Magnaflow muffler, EGR bug deflector, Bushwacker fender flares, customized Nfab nerf bars, CB radio, Autonet wi-fi router, custom soft tonneau cover, Line_X bedliner, DEBO Step, build date 10/15/08 a Wednesday built vehicle
Reply With Quote
  #23  
Old 10-31-2010, 08:58 PM
brad12kx's Avatar
brad12kx brad12kx is offline
Just some guy in Canada


 
Join Date: Apr 2010
Location: Brandon, MB
Posts: 22,792
Gender: Male
Vehicle: 2010 Ram 1500 QC
Trim Level: Sport
Color: Black
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 21
Rep:2581
brad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond repute
Default

ECO and MDS are not the same thing and are only partially related. ECO is just an indication that you are driving in what some programmer considered to be an economical fashion, and suggests that you are getting pretty good fuel mileage.

MDS will only kick in when the load on the engine is low enough for the 4 cylinder operation to maintain the vehicle speed without over fueling.

Partial relationship -
You can be in ECO mode without MDS....but not the other way.
In order for the MDS to kick in, you must already be driving in 'ECO' mode.
__________________
brad

Interested in one of my mods?
If it's underlined, it's a link to that mods thread.

2010 Ram 1500 Hemi Sport, 3.92, Leather, NAV, Alpine, Sunroof, Trailer tow, Brake Contoller, Rear Cam
Mods - 3M clear protect, Decals removed, Electric Tailgate Lock, Tow Hooks, Skid Plates, Bed Rug, Pace Edwards Bedlocker Electric Tonneau, Timbren Rear SES, Tinted Tail Lights, Debadged, Grill Blacked Out, Shorty Antenna, Black Chromed Emblems, Lightly tinted front windows, DS Predator, Cabin Air Filter, K&N Drop In, Mufflex (Magnaflo) DOD24M, Sonnax line pressure booster, Volant CAI
Reply With Quote
  #24  
Old 11-24-2010, 03:14 PM
datrep's Avatar
datrep datrep is offline
Dodge Ram Forum Senior Member!
 
Join Date: Sep 2010
Age: 32
Posts: 80
Gender: Male
Vehicle: 2010 Dodge Ram
Trim Level: ST
Color: White
Engine: 2009-2010 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
Rep:48
datrep is on a distinguished road
Default

So I just changed my oil about 500 miles ago, and used 10w-30. Should I rechange my oil and use 5w-20 or wait to do it next 2500 miles? I live in south GA and it rarely drops below 40 degrees here in the winter.
Reply With Quote
  #25  
Old 11-27-2010, 11:05 PM
SvB4EvA's Avatar
SvB4EvA SvB4EvA is offline
Dodge Ram Forum Senior Member!
 
Join Date: Sep 2010
Location: Queens, NY
Posts: 277
Gender: Male
Vehicle: 2010 RAM 1500 4x4
Trim Level: Big Horn
Color: Inferno Red
Engine: 2009-2010 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
Rep:25
SvB4EvA is on a distinguished road
Default

Quote:
Originally Posted by datrep View Post
So I just changed my oil about 500 miles ago, and used 10w-30. Should I rechange my oil and use 5w-20 or wait to do it next 2500 miles? I live in south GA and it rarely drops below 40 degrees here in the winter.
The book says to use 5w-20 ONLY, no matter what climate you live in. It also mentions something about any other weight of oil will affect the MDS system.
__________________
-Steve
Reply With Quote
  #26  
Old 11-29-2010, 04:49 PM
josh06ram's Avatar
josh06ram josh06ram is offline
Dodge Ram Forum Member
 
Join Date: May 2010
Location: Hamilton, Ontario Canada
Age: 24
Posts: 74
Gender: Male
Vehicle: 2006 Dodge Ram 1500
Color: White
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
Rep Power: 0
Rep:79
josh06ram will become famous soon enough
Default

how do you know if your truck has it? would my 06 have it?
__________________
BIG DIRTY!
Reply With Quote
  #27  
Old 02-14-2011, 03:44 AM
Offline's Avatar
Offline Offline is offline
Dodge Ram Forum Newcomer
 
Join Date: Feb 2011
Location: Juneau AK
Age: 41
Posts: 6
Gender: Male
Vehicle: 2008 Dodge Ram 1500
Trim Level: Laramie
Color: White
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
Rep Power: 0
Rep:10
Offline is on a distinguished road
Default

Quote:
Originally Posted by josh06ram View Post
how do you know if your truck has it? would my 06 have it?
I'm pretty sure the first year was 2008, but don't quote me on that as internet research says 2009. check your owners manual to be sure.. mine says I have MDS (2008 5.7 hemi)
Reply With Quote
  #28  
Old 03-03-2011, 12:19 PM
Fuel100's Avatar
Fuel100 Fuel100 is offline
Dodge Ram Forum Newcomer
 
Join Date: Feb 2011
Location: Amarillo, TX
Posts: 9
Gender: Male
Vehicle: 2011 Ram 1500
Trim Level: Lone Star SLT
Color: Brilliant Black
Engine: 2009-2010 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
Rep:13
Fuel100 is on a distinguished road
Default

OK. To add to the mystery. I just purchased my 2011 1500 with 5.7 Hemi. I have had two vehicles with this same engine and know how the MDS works, with the exception of this one.

I have seen the ECO light come on many times, but it doesn't feel like the engine is going into MDS mode when the light comes on. I have never seen a "Fuel Saver" light come on at anytime while driving. I only have 422 miles on the truck so far. Does that have something to do with it? I'm not driving in autostick, so I know that's not it. I don't think I'm driving in Tow/Haul mode. My mileage is horrible. Mostly highway driving and getting less than 14mpg.

If any of you have answers, I would appreciate it. Driving like I have been, if I were in my Charger I would be getting 20-24 mpg.
__________________
Sincerely,
Steve
Reply With Quote
  #29  
Old 03-04-2011, 12:24 AM
brad12kx's Avatar
brad12kx brad12kx is offline
Just some guy in Canada


 
Join Date: Apr 2010
Location: Brandon, MB
Posts: 22,792
Gender: Male
Vehicle: 2010 Ram 1500 QC
Trim Level: Sport
Color: Black
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 21
Rep:2581
brad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond reputebrad12kx has a reputation beyond repute
Default

Quote:
Originally Posted by Fuel100 View Post
OK. To add to the mystery. I just purchased my 2011 1500 with 5.7 Hemi. I have had two vehicles with this same engine and know how the MDS works, with the exception of this one.

I have seen the ECO light come on many times, but it doesn't feel like the engine is going into MDS mode when the light comes on. I have never seen a "Fuel Saver" light come on at anytime while driving. I only have 422 miles on the truck so far. Does that have something to do with it? I'm not driving in autostick, so I know that's not it. I don't think I'm driving in Tow/Haul mode. My mileage is horrible. Mostly highway driving and getting less than 14mpg.

If any of you have answers, I would appreciate it. Driving like I have been, if I were in my Charger I would be getting 20-24 mpg.
Give it some time to 'learn' how to run. It's brand new, and just like a new baby, it needs some learning time before it can walk and talk. You will find that during the first 3000 miles, it will change a lot. The next 3000, not so much, but it will change.

When I first got mine, it seldom when into MDS mode, and when it did, I knew it! Now, it spends more time in MDS then not, and the driving conditions are far more demanding than when I got it. I noticed a rather radical change in operation around the 3000 mile mark. More power, better mileage, smoother running....all positives.

Try your best to remember in detail how it performs/operates right now, and remind yourself of that in another 2500 miles......then let us know what your thoughts/experiences are.
__________________
brad

Interested in one of my mods?
If it's underlined, it's a link to that mods thread.

2010 Ram 1500 Hemi Sport, 3.92, Leather, NAV, Alpine, Sunroof, Trailer tow, Brake Contoller, Rear Cam
Mods - 3M clear protect, Decals removed, Electric Tailgate Lock, Tow Hooks, Skid Plates, Bed Rug, Pace Edwards Bedlocker Electric Tonneau, Timbren Rear SES, Tinted Tail Lights, Debadged, Grill Blacked Out, Shorty Antenna, Black Chromed Emblems, Lightly tinted front windows, DS Predator, Cabin Air Filter, K&N Drop In, Mufflex (Magnaflo) DOD24M, Sonnax line pressure booster, Volant CAI
Reply With Quote
  #30  
Old 03-04-2011, 12:31 AM
RansRAM's Avatar
RansRAM RansRAM is offline
Addicted to the Z


 
Join Date: Feb 2010
Location: Mississauga, Ontario, Canada
Age: 55
Posts: 12,500
Gender: Male
Vehicle: 2014 RAM 1500 Limited
Trim Level: Crew Cab 4X4 Limited
Color: PX8 Black
Engine: 2014-20?? 182.3ci (3.0L) L630DOHC V6 240hp 420lb/ft Eco-Diesel
Rep Power: 15
Rep:2471
RansRAM has a reputation beyond reputeRansRAM has a reputation beyond reputeRansRAM has a reputation beyond reputeRansRAM has a reputation beyond reputeRansRAM has a reputation beyond reputeRansRAM has a reputation beyond reputeRansRAM has a reputation beyond reputeRansRAM has a reputation beyond reputeRansRAM has a reputation beyond reputeRansRAM has a reputation beyond reputeRansRAM has a reputation beyond repute
Smile

Quote:
Originally Posted by brad12kx View Post
ECO and MDS are not the same thing and are only partially related. ECO is just an indication that you are driving in what some programmer considered to be an economical fashion, and suggests that you are getting pretty good fuel mileage.

MDS will only kick in when the load on the engine is low enough for the 4 cylinder operation to maintain the vehicle speed without over fueling.

Partial relationship -
You can be in ECO mode without MDS....but not the other way.
In order for the MDS to kick in, you must already be driving in 'ECO' mode
.
^^^^ That's the best explanation i've seen in laymans terms, WYG Brad !!!!!
__________________
New Signature Pic Pending
Shorty Antenna, Recon 3rd Brake & Xtreme LightBar, DeeZee Tailgate Assist, MOPAR Valve Caps, Lighted RAM hitch cover, Tints (20% frt),Bug deflector, LED Interior Lights,.
Reply With Quote
Reply

Bookmarks

Thread Tools

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


Advertisement






All times are GMT -4. The time now is 02:50 AM.


= Copyright RamForumZ.com a Gigathreads.com Network Site =Ad Management by RedTyger
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
vB.Sponsors


=Gigathreads Network=
CLUBS MOPAR NATION DSM GPMM MAMM JAM
DIESEL Diesel Forum      
CHEVY Chevy Camaro Forum Chevy Volt Forum    
CHRYSLER Chrysler 300C Forum      
DODGE Dodge Avenger Forum Dodge Caliber Forum Dodge Challenger Forum Dodge Charger Forum
  Dodge Circuit Forum Dodge Hornet Forum Dodge Magnum Forum Dodge Nitro Forum
  Dodge Ram Forum Dodge Dakota Forum Dodge Durango Forum Dodge Dart Forum
FORD Ford Raptor Forum Ford F150 Forum Ford F100 Forum  
JEEP Jeep Forum      
PONTIAC Pontiac G8 Forum      
SRT SRT Viper Forum SRT Cuda Forum