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Author Topic: Acadia mpg how to improve  (Read 29788 times, 103 Replies)
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Nflddog1000
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« on: December 10, 2011, 04:40:54 PM »

I recently purchaised a 2011 for the wife and as you all know it's a pig on gas, so what to do to improve it just installed an intake kit it through a code first then remapped itself now it's gone, was talking to my tuner and he said all he thinks all he can do now is the tranny which would help to tighten up the converter a bit. My issues with this vehicle first is WTF put a 7000rpm car engine in a heavy SUV should be a 5000rpm torque monster, another is the stall can't touch the gas without it hitting 3000, so what to do, my CCSB Sierra with a lot of mods gets better mpg.
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« Reply #1 on: December 10, 2011, 10:02:14 PM »

I have excellent results by slowing down.
From what Ive learned- other parts of the country- you cant do 55-60 without being driven off the road.
But here in SoCal- I easily can do 55-60. I just did a 500 mile trip with 6 on board- 26-28 MPG.

But being careful how you drive in city.
I can say that when the missus drives in city- the MPG drops to 12-15.
When I drive- it goes up to 16-18 (city).
If I drive combined- 19-22.

Ive seen it all in my Traverse. From 31.3 MPG all highway trip-  to 12 MPG in city.
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« Reply #2 on: December 11, 2011, 05:26:15 AM »

The "fly by wire" throttle system is extremely unforgiving. The less throttle increase or decrease; the better your MPG should be. Also; new engines seem to need miles before any kind of real results can be expected. This is an entire new platform vehicle; so comparing this vehicle to any other GM vehicle is moot.


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« Reply #3 on: December 11, 2011, 09:32:18 AM »

I've noticed horrible gas milage since it became cold here in toronto. I'm probably getting 12-14 city.
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« Reply #4 on: December 11, 2011, 09:52:43 AM »

Why does anyone think this vehicle will do well with city mpg Huh?
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« Reply #5 on: December 11, 2011, 11:21:00 AM »

Its not that, seems like a huge jump from the estimated highway mpg to city, its like double.
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« Reply #6 on: December 11, 2011, 11:52:03 AM »

Its not that, seems like a huge jump from the estimated highway mpg to city, its like double.
I guess it's all about the type of "city" driving you are doing.  If it's literally stop and go on the streets of Manhattan, 5,000 lb vehicle will be horrible and nowhere near what the sticker says.  We get 17ish when not cruising on the highway but that's certainly not in city street type stop and go.
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« Reply #7 on: December 11, 2011, 08:55:31 PM »

I've noticed horrible gas milage since it became cold here in toronto. I'm probably getting 12-14 city.

Two issues I have found...

1) Using the remote start every morning and afternoon due to cold weather, that uses a lot of fuel

2) Filling-up at Petro Canada, they use additives in the fuel formulated for winter, the consumption goes very high in the winter, but the engine always starts easy and smooth.
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« Reply #8 on: December 11, 2011, 08:57:30 PM »

Now that I've got 11,000 km on the new Acadia, the mileage is getting better. It has been horrible for the first few thousand km's on all three of my Acadias.

I've also noticed that setting the cruise control to 105 instead of 120 on the highway saves a lot of fuel.
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« Reply #9 on: December 12, 2011, 08:31:03 AM »

I've noticed horrible gas milage since it became cold here in toronto. I'm probably getting 12-14 city.

Your doing better than me.  My wife's 2010 is averaging about 10.5 mpg in the city year round.  If it would at least get the 14 mpg in the city as advertised I'd be happy.  It's pretty bad that my full size Dodge Ram Crew Cab with a Hemi gets a little better mileage in the city than the Acadia (though it's nothing to write home about).  Just a heavy SUV with an under powered V-6 causing it to really burn up the gas to move it around in stop and go traffic.
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« Reply #10 on: December 12, 2011, 03:27:30 PM »

Your doing better than me.  My wife's 2010 is averaging about 10.5 mpg in the city year round.  If it would at least get the 14 mpg in the city as advertised I'd be happy.  It's pretty bad that my full size Dodge Ram Crew Cab with a Hemi gets a little better mileage in the city than the Acadia (though it's nothing to write home about).  Just a heavy SUV with an under powered V-6 causing it to really burn up the gas to move it around in stop and go traffic.

My wife also has a lead foot  Cheers
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« Reply #11 on: December 12, 2011, 03:35:55 PM »

According to my trusty sreadsheet I've had pretty consistent milage for the life of the veh so far.
Currently its at 17.42 mpg @68000 miles
Year 1 (18k mils) 17.02

Lifetime avg mph is 38mph



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« Reply #12 on: December 12, 2011, 04:14:11 PM »

According to my trusty sreadsheet I've had pretty consistent milage for the life of the veh so far.
Currently its at 17.42 mpg @68000 miles
Year 1 (18k mils) 17.02

Lifetime avg mph is 38mph

What kind of driving conditions are those under.  Lifetime average really doesn't mean much.  I check mine on just pure city driving then reset it when I'm hitting the highway so I don't get a mix of the two bur rather an honest number for each.  In town is consistently 10.5 mpg and crusing on the highway at 57 is 21.5 mpg and cruising at 72 is about 20.5 mpg.
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« Reply #13 on: December 12, 2011, 04:15:22 PM »

The onstar phone app- will also give your vehicles Lifetime overall MPG.
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« Reply #14 on: December 12, 2011, 04:15:36 PM »

My wife also has a lead foot  Cheers

Neither me or my wife accelerate fast or drive fast so our mpg numbers are based on pretty real world conditions.  It's hard to have a lead foot in a 5,500 lb vehicle with an underpowered V-6 in my opinion.
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« Reply #15 on: December 12, 2011, 04:17:19 PM »

The onstar phone app- will also give your vehicles Lifetime overall MPG.

That just doesn't do any good for me.  Why would I want to know a lifetime average?  I just reset the mpg rating everytime I'm in different driving conditions when I really want to check it and get an accurate number.  Doesn't mean I do it every day but since most of our driving is strictly city I can pretty much leave it alone until we hit an expressway.
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« Reply #16 on: December 12, 2011, 05:39:11 PM »

yeah- I was surprissed that it was the lifetime MPG on that app.
But it shows that the vehicle keeps a lifetime MPG reading in its memory.

I too reset at every fill up- and keep records of my MPG's
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« Reply #17 on: December 13, 2011, 08:46:16 AM »

My Outlook has averaged 17.6 over the ~19 months and ~33K miles we've owned it. 

I wish I could check the lifetime MPG, but I can't use the OnStar app with my Saturn.  One of the joys of owning an obsolete brand, no love from GM anymore.  Cry
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« Reply #18 on: December 13, 2011, 08:58:37 AM »

What kind of driving conditions are those under.  Lifetime average really doesn't mean much.  I check mine on just pure city driving then reset it when I'm hitting the highway so I don't get a mix of the two bur rather an honest number for each.  In town is consistently 10.5 mpg and crusing on the highway at 57 is 21.5 mpg and cruising at 72 is about 20.5 mpg.

Well that a city/hwy mix...

checking with my spreadsheet  (high and low avg mph readings;  I used to reset each fill up, but more recently just when I remember might be around 500-750 mile intervals..

Early age of vehicle (first year)
Low avg MPH - 29.4 avg mph for 572 mile @14.9mpg
High avg MPH - 56.8 avg mph for 290 miles @ 20.3 mpg (thule taho bag on top of roof rails, fully loaded car).

Unf most of my highway milage is from NC to NY and back with the bag on top....

Past year
Low avg MPH - 28.8 avg mph for 215 miles @ 15.4 mpg
High avg MPH - 66.8 avg mph for 404 miles @ 20.2 mpg (again hwy milage with tahoe bag on top, fully loaded car)


So pretty consistent from year 1 to almost 70k miles later.


Interesting Tire data
First set -  28k miles avg MPH was 36mph, 16.9 mpg -  Good Year OEM tires
Sec set - 40k miles avg MPH was 39mph, 17.9 mpg - Hankook tires

I am the primary driver, so driving style has been consistent throughout the life of the car.
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« Reply #19 on: December 13, 2011, 09:10:13 AM »

Neither me or my wife accelerate fast or drive fast so our mpg numbers are based on pretty real world conditions.  It's hard to have a lead foot in a 5,500 lb vehicle with an underpowered V-6 in my opinion.

Back to being underpowered... why do you own one then if you hate the engine so much? For a 5000lb vehicle this thing hauls , I find it very powerful for an suv.

Perhaps I'm just used to much smaller engines, this is the largest engine I've ever owned (had lots of V8 work trucks, but none of them were peppy like the Acadia)

The largest engine I have owned prior to the Acadia was a 2.8 litre V6 in an Audi A4. It was 190 hp and it felt like a rocket to me. I've had 2 Honda Accords, A Subaru Legacy Outback (very gutless), and 2 Volvo 240 Turbos... and the Acadia has more power then any of them. The Audi was faster but much lighter. Add a couple adults into the Audi and it was slow and gutless.
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