small dip in MPG

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Oct 15, 2015 | 08:25 PM

lysingerjj

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Joined: August 27, 2015

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I typically get 21.6 mpg in my 2011 GT auto. Personally I think this is an astonishing number for a 5.0 litter v8. 2-3 Days later I noticed it was only getting 20.5 not a terrible decrease infact thats not the reason im asking, its more because of possible power decrease. The only thing I did between these Few days was remove the RAM air intake to make sure it was sealed well and replaced it immediately after and double checked to make sure it was tight. Also, will my 0-60 and 1/4 mile time be reduced?

Last edited by lysingerjj; Oct 15, 2015 at 08:42 PM.

Oct 16, 2015 | 05:35 AM

MRGTX

Shelby GT350 Member

Joined: May 18, 2010

Posts: 2,318

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From: CT

Need more data.

~1mpg variation could be easily caused by almost any variable. Even a drop in temperature (which is happening in much of the northern hemisphere during this time of year) could cause that, even with the exact same driving cycle.

I'm not trying to downplay your concerns but I see nothing significant here.

Oct 16, 2015 | 09:37 AM

Last1

Mach 1 Member

Joined: October 25, 2012

Posts: 585

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From: NJ

I wish that I got 21. Mine is a consistent 17.5-19.5... No matter what I do. I skip shift, coast to stops in traffic, etc. There's just too much traffic.

Oct 16, 2015 | 11:39 AM

Jazzman442

Cobra Member

Joined: April 7, 2014

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Happens in Florida all of the time. Temps go high and low gas millage goes all over the place.

Oct 16, 2015 | 11:53 AM

mhazelwd

GT Member

Joined: April 23, 2014

Posts: 155

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From: Texas

I used to get 21.6, now I am at around 19.6

when I go for a road trip on the highway, it goes back up for a while

Oct 18, 2015 | 04:25 PM

backin15

GT Member

Joined: March 21, 2014

Posts: 123

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From: Burnsville, MN

Name: 20151018_170222.jpg
Views: 48
Size: 78.4 KB

Last edited by backin15; Oct 18, 2015 at 04:26 PM.

Oct 18, 2015 | 04:50 PM

Last1

Mach 1 Member

Joined: October 25, 2012

Posts: 585

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From: NJ

Quote:

Originally Posted by backin15

Set that to 30 minutes and take another picture after driving 30+ minutes...

Last edited by Last1; Oct 19, 2015 at 04:19 AM.

Oct 18, 2015 | 09:06 PM

shaneyusa

2014 SGM Roush Stage 2 --------- Moderator------

Joined: July 7, 2013

Posts: 3,176

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From: Idaho

Wow, I am not getting any where near where you guys with the GTs are. I run 91 non-ethanol and I am seeing 16.3. It is a mix of freeway and city driving. Could be the Trackey performance tune. But I do not see any difference when I run my Black key.

Oct 19, 2015 | 01:05 PM

Springer200

V6 Member

Joined: June 17, 2014

Posts: 58

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You also may see differences in MPG as fuel suppliers move to winter blends.

Oct 20, 2015 | 12:17 AM

#10

3point7

Mach 1 Member

Joined: December 11, 2014

Posts: 837

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Quote:

Originally Posted by lysingerjj

That's good mpg. I average 21.4 in my V6.

Oct 21, 2015 | 07:58 AM

#11

JoeMidnight

Cobra Member

Joined: April 21, 2014

Posts: 1,099

Likes: 2

From: Canada, Ontario

since I've been using 91octane (base tune) I've been seeing a lot better mileage.

The 28MPG is what i'm getting right now with my Base 17" wheels (Winter tires)
Yep, I just put them on this weekend

The 25.7 MPG average was my 19's.

Amazing numbers for a car of this calibre.

Those averages include some pulls here and there. It's impossible to drive this thing moderately all of the time