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2015 ATS Premium 3.6 Coupe RWD built 12/2014
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52 Posts
Discussion Starter #1
Sounds crazy but I got better mileage using sport mode than tour mode. Tour mode 24.2, sports mode 25.3. I have a 2015 ATS Coupe Premium with a 3.6 with 2500 miles on the car.

I am a conservative driver and the test was taken to and from my destination a distance of 10 miles one way. About 5 stop light along the way.

The steering, handling and ride was much firmer using sport mode. I like the tour mode better.
 

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2014 2.0t AWD
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276 Posts
You got a difference of 1mpg over 10 miles - I think that could be due to a lot of things that have nothing to do with the car: Head/tail wind, slight uphill/downhill, etc. I think it would be more meaningfull if you got those results across several tankfulls.
 

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2017 Prem-Lux CT6 3.0TT - Black Raven, 2013 SRX Platinum Ice
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329 Posts
I prefer tour mode too. I wish it was even softer for around town. Sport mode keeps the wheels glued to the road better. I get a little wheel hop on a curved bridge at the expansion joints when in tour mode, but sport mode the hop at the expansion joint is gone.
 

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548 Posts
I honestly don't believe one will give better mpg ove4 the other. It's all how driver works the pedal. I've driven a luxury trim and premium over 100 miles each and very similar results. This was on a 2.0 though.
 

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2013 ATS 2.0T RWD, DP, Intake, HPT, CC
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2,404 Posts
With low miles, mpg measured early may be lower than mpg measured after a longer break in period. Were the measurements recent?

Agree that 10 miles is not enough. 3 tankfuls would be better to eliminate filling variances.
 

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1,102 Posts
You don't have enough data to support your find. As others have mentioned there are too many variables to influence those numbers.
 
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