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3.6 vvt vs 5.7 mds on mpg ? #2657813
05/21/19 11:50 PM
05/21/19 11:50 PM
Joined: Jul 2008
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Florida STAYcation
dIc dOc Deity ! Offline OP
The village idiot's idiot
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Obviously in town the 5.7 isn’t going to come near the 3.6 as far as mpg BUT HOW ABOUT on the hwy under a lite cruise situation ...... when the mds comes in on the Hemi ?

Re: 3.6 vvt vs 5.7 mds on mpg ? [Re: dIc dOc Deity !] #2657868
05/22/19 07:10 AM
05/22/19 07:10 AM
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USA
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360view Offline
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Big frontal area pickup, or smaller car?

On identical 2018 2wd 1500 Rams my test drives looking at the trip computer readouts showed the Pentastar 3.6 V6 getting 3 MPG better at 70 mph on level blacktop than the 5.7 which has MDS and VVT. The trip computers can’t really be trusted unless you calibrate them.

MDS is not really the best way to get fuel economy. Gear ratios and tire sizes that get more MPH per 1000 rpm are a better way to achieve best fuel economy when the engine displacement is large. MDS gives near instant acceleration to pass or HP to climb hills but just a little economy boost.

The 5.7 will have better resale value.

Re: 3.6 vvt vs 5.7 mds on mpg ? [Re: 360view] #2658069
05/22/19 04:28 PM
05/22/19 04:28 PM
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Florida STAYcation
dIc dOc Deity ! Offline OP
The village idiot's idiot
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Either a 300 or Charger ... now are there 5.7s that do NOT have mds?

Re: 3.6 vvt vs 5.7 mds on mpg ? [Re: dIc dOc Deity !] #2658107
05/22/19 05:46 PM
05/22/19 05:46 PM
Joined: Jan 2005
Posts: 12,406
Kalispell Mt.
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HotRodDave Offline
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Kalispell Mt.
just trucks, durangos and manual trans challengers


I am not causing global warming, I am just trying to hold off a impending Ice Age!



Re: 3.6 vvt vs 5.7 mds on mpg ? [Re: HotRodDave] #2658359
05/23/19 11:43 AM
05/23/19 11:43 AM
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Calgary, Alberta Canada
a12rag Offline
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Calgary, Alberta Canada
I still have my 06 Magnum RT AWD . . . as well as company car - 2017 Journey GT AWD (3.6 V) . . . . not same cars, sure, but within 1mpg travelling on highway when on cruise control. The think the 06 Magnum V6 was rated just 1mpg more than the 5.7 hemi . . . yes, around town is where you notice it more. But on highway, the hemi with mds sure works nice on mpg, but even the hemi power is especiallynice when you need to pass ! . .

Just too bad they have the tranny in the Journey programmed for mpg, and it is a slug to downshift . . . makes the 3.6 seem weak. But I have rented 300's with the 3.6 and 8 speed auto . . .gotta say, that is a nice combination ! Makes the 3.6 seem like a way better engine than in the Journey !! . . .

Re: 3.6 vvt vs 5.7 mds on mpg ? [Re: a12rag] #2658576
05/23/19 09:53 PM
05/23/19 09:53 PM
Joined: May 2003
Posts: 6,545
Downtown Roebuck Ont
Twostick Offline
Still wishing...
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Downtown Roebuck Ont
Have an 05 300C with just MDS that gets mid 20's highway indicated with me driving. Cruise set at 75 and both feet on the floor getting there. My wife drove it to Carlisle one year and running 60-65 down I81 it indicated 28 when she arrived.

I have rented several new 300's and Chargers with the Pentastar V6 and that 8 speed that will do 30-32 indicated driven the same way I drive my own.

Kevin

Re: 3.6 vvt vs 5.7 mds on mpg ? [Re: Twostick] #2658584
05/23/19 10:13 PM
05/23/19 10:13 PM
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Florida STAYcation
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2 guy ! .... but doesn’t mpg normally tank BIG TIME on most newer vehicles after 68-70 ? .... the latest model I have now is an 05 and it sure goes down hill fast after 68-70. Most trips I take I just click the cruise at 62 or so and enjoy the view. IF I’m in a big hurry I’ll take a jet plane !

Re: 3.6 vvt vs 5.7 mds on mpg ? [Re: dIc dOc Deity !] #2658630
05/24/19 12:15 AM
05/24/19 12:15 AM
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Posts: 8,390
Highland, MI.
Sunroofcuda Offline
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Highland, MI.
Doc, I can tell you this:

I just traded in my 2014 300 3.6L with AWD today for a 20,000 mile certified 2016 300S RWD. Before my 2014, I had a 2012 RWD 300 - all have had the 3.6L.

My 2012 300 would get 24-25 MPG around town, & 33 on the highway. AMAZING.

My 2014 AWD would get around 20-21 around town, & 26-26.5 highway. The RWD vs. AWD made a huge difference. The '16 I picked up today with just RWD is exactly what I wanted. MPG should be equivalent to my 2012. These 300's have been amazing cars.


No Man With A Good Car Needs To Be Justified
Re: 3.6 vvt vs 5.7 mds on mpg ? [Re: dIc dOc Deity !] #2658669
05/24/19 07:33 AM
05/24/19 07:33 AM
Joined: May 2003
Posts: 6,545
Downtown Roebuck Ont
Twostick Offline
Still wishing...
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Downtown Roebuck Ont
Originally Posted by Doc Fiberglass
2 guy ! .... but doesn’t mpg normally tank BIG TIME on most newer vehicles after 68-70 ? .... the latest model I have now is an 05 and it sure goes down hill fast after 68-70. Most trips I take I just click the cruise at 62 or so and enjoy the view. IF I’m in a big hurry I’ll take a jet plane !


Absolutely it tanks, new or old, but when you take into consideration it's a 4400 lb sedan that can blow the doors off just about every stock muscle car we hold near and dear from the 60's and 70's and on regular gas to boot, well that's as close to having cake and eating it too as you will ever get.

Kevin

Re: 3.6 vvt vs 5.7 mds on mpg ? [Re: Twostick] #2658743
05/24/19 11:47 AM
05/24/19 11:47 AM
Joined: Jan 2011
Posts: 15,713
Central Florida
larrymopar360 Offline
Stud Muffin
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Central Florida
All I can report is that I consistently get 17-18 mpg on my 5.7's in mostly around town driving. I'm fairly easy on the peddle unless I need it to merge, etc. That's with up to 10 percent ethanol crap.


Facts are stubborn things.
Re: 3.6 vvt vs 5.7 mds on mpg ? [Re: larrymopar360] #2658794
05/24/19 02:06 PM
05/24/19 02:06 PM
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Red Deer, Alberta
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Greenwood Offline
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Red Deer, Alberta
My niece is driving a fairly new Ram 1500 with the 3.6, and she doesn't appear to get any better mileage than my 09 5.7. This is highway driving. She has a 100 mile round trip commute every day. I consistently get 100 km (60 miles) more per tank with my 09 than I did with either of my 03's, and having an extra gear basically makes the truck feel about 2000 lbs lighter in city driving. Like our Nitro, the fuel economy doesn't really drop off until you get up past 80 mph. The Nitro (with that wonderful 3.7) drops off more dramatically, though. It also doesn't like wind or hills.
I fail to grasp how Benz managed to create a clean-sheet engine that was 50 years newer than the old Jeep 4.0, and a good 25 years newer than the old 3.9 Magnum, that barely makes any more power, and gets only marginally better fuel economy than either one. That should have been a 250-280 hp fuel sipper, compared to what it replaced.

Re: 3.6 vvt vs 5.7 mds on mpg ? [Re: Greenwood] #2658846
05/24/19 06:23 PM
05/24/19 06:23 PM
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Interesting convo going here guys THX .... I’ll BBL !

Re: 3.6 vvt vs 5.7 mds on mpg ? [Re: 360view] #2661423
06/02/19 08:00 AM
06/02/19 08:00 AM
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USA
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360view Offline
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By chance saw this 4wd Tradesman Ram 3.6L V6 7000 lb trailer towing MPG test versus an 2 wd F150 5.0 V8

https://www.motor1.com/news/329163/...edium=referral&utm_campaign=msn-feed

Sample quote

As for the actual test, each truck towed the same double-axle horse trailer filled with 7,000 pounds of ballast. The trucks also covered the same 98-mile circuit at the same target speed of 70 mph.
Watching the video it appears both pickups have no problem pulling the heavy load, and at the end of the run, both have similar fuel mileage figures despite the differences in engine, drivetrain, and weight.
Ultimately, the V8 edges out the V6 with a manually calculated average of 9.2 versus 9.0 MPG, however, the F-150’s indicated average of 9.5 was further off from the manual math than the Ram 1500, which estimated an average of 9.1.

End quote

Re: 3.6 vvt vs 5.7 mds on mpg ? [Re: 360view] #2661475
06/02/19 11:10 AM
06/02/19 11:10 AM
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Alberta
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440_Offroader Offline
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Alberta
The wife had a 2011 Durango with a Hemi, and averaged 20mpg on a road trip. My 2014 Charger AWD 8spd with the 3.6 can get 31mpg doing 60mph and 19mpg in town driving. If I baby it I can get 20mpg. I know it's not apples to apples, as the Durango is over 7000lbs and not as aero as the 4100lb charger.
Some vehicles being equal, can get varied mpg for some reason. The way they get driven will affect it considerably too. Heck, I can get 14mpg in town with my 383 Challenger... if I drive it nice. I did that once, but it's hard to keep a light foot!







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