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 - Help Zone - Dodge Ram Problems, Complaints, & Solutions - Maintenance & Re > Dodge Ram MPG Zone


Notices

Dodge Ram MPG Zone Discuss your MPG woes and helpful hints here!


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

Reply
 
Thread Tools
  #1  
Old 08-27-2013, 12:19 PM
Nauvoo Nauvoo is offline
Dodge Ram Forum Senior Member!
 
Join Date: May 2013
Location: Winfield, Al
Posts: 119
Gender: Male
Vehicle: 2012 Dodge Ram 4x4
Trim Level: Big Horn Quad Cab
Color: Sagebrush Pearl
Engine: 2009-2012 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
Rep:10
Nauvoo is on a distinguished road
Default 180 Thermostat dropped MPGs

Swapped to the 180 Thermostat about three weeks ago and so far MPGs seem to have fallen off by atleast 1. Haven't changed anything else and Im driving as normal. Were headed down to PCB this weekend and it will be my third trip since I purchased the truck so should give me a good comparison. As truck got 18+ when stretched out on tha Interstate. Right now 16.2 is as good as it'll get. Does that mod normally have this affect on MPG? I done the airbox mod bout a month before this one and it looked llike my MPG had come up some, butI had done some towing in that month which brought my avg down and I didnt drive the truck enuff before changing thermostat to get the avg back up. Not necessarily thinking the thermostat mod is good at this point. Tho temps do stay down around 181. Maybe Im trading mileage for longevity. Also this is all based on EVIC and the arrow that coincides with over all avg and the bar that moves with instantaneous mileage are leveled out with each other unless like going down a hill or letting off gas. So Im not expecting avg to come up. Maybe Im being clear enuff to understand. And I havent checked mileage with math, strictly EVIC.
__________________
Air Intake Mod, K&N Drop-in, Catch Can, Flowmaster Super 44, Airlift 1000s, Cooper AT3s LT275/65r20, Draw-tite gooseneck hitch,

Last edited by Nauvoo; 08-27-2013 at 12:27 PM. Reason: adding some info
Reply With Quote
Sponsored links
  #2  
Old 08-27-2013, 11:42 PM
ExpensiveToys ExpensiveToys is offline
Dodge Ram Forum Junior Member
 
Join Date: Oct 2012
Posts: 43
Gender: Male
Vehicle: Ram
Rep Power: 0
Rep:7
ExpensiveToys is an unknown quantity at this point
Default

On 2011 and newer Ram's anything with a lower temp setting than the stock thermostat is going to lower your gas mileage unless you live in a hot climate. Will even get worse in the winter if you have cold winters.

The performance profiles of the computer does everything possible to get the engine up to 190 degree zone to maximize fuel efficiency and lower emissions. If you put in a 180 stat it makes it more difficult for the engine to do that so it ends up running a different (warmup) performance profile and does things like not shutting off fuel to engine when coasting and/or keeping MDS from working. Basically its burning extra fuel trying to get engine up to temp. If ambient air temp or engine load isn't enough to get it up to 190 then it will keep burning extra fuel.

Its even worse of a problem on 2013/2014 as I they route engine coolant to a heat exchanger via an electronic thermostat to get transmission up to 190 temp to reduce wear and friction. In colder climates with a 180 thermostat it can start causing premature wear in the transmission.

There is a myth that the 180 thermostat in the 4th gen's helps with engine longevity but its actually bad for the engine and transmission, not to mention fuel economy. Go back to stock thermostat, its must better for your truck.
Reply With Quote
  #3  
Old 08-29-2013, 11:19 AM
Nauvoo Nauvoo is offline
Dodge Ram Forum Senior Member!
 
Join Date: May 2013
Location: Winfield, Al
Posts: 119
Gender: Male
Vehicle: 2012 Dodge Ram 4x4
Trim Level: Big Horn Quad Cab
Color: Sagebrush Pearl
Engine: 2009-2012 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
Rep:10
Nauvoo is on a distinguished road
Default

Yea Ill just swap it back. Thats kinda what I figured was goin on. When the avg and instantaneous mileage leveled out at 16.2 I thought there wasnt gonna be much more to gain. Drove the truck to work the other day, which has a good bit of interstate and it never came up. Oh well, I appreciate the response tho.
__________________
Air Intake Mod, K&N Drop-in, Catch Can, Flowmaster Super 44, Airlift 1000s, Cooper AT3s LT275/65r20, Draw-tite gooseneck hitch,
Reply With Quote
  #4  
Old 09-06-2013, 01:26 PM
spp spp is offline
Dodge Ram Forum Senior Member!
 
Join Date: Jul 2013
Location: Michigan
Age: 36
Posts: 2,372
Gender: Male
Vehicle: 2008 Jeep Wrangler
Trim Level: Sahara
Color: Steel Blue
Rep Power: 3
Rep:106
spp will become famous soon enoughspp will become famous soon enough
Default

Interesting. A lot of the Jetta TDI folks want to get the temp higher for better economy. Stock on the Mk4 Jetta is 195. A lot of people are building their own 200 or 205 degree stats.

I wonder if the same thing would benefit here...
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 10:53 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