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Silly right!! ... but my 5.7 can easily get 23mpg, and you can tell at times when in ECO mode. Was wondering if all the rest, 392's, 6.1 etc have the ECO mode. thanks.
 

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On my '15 A8 SRT 392 I could get around 26 MPG when I wanted to. The MDS for the auto transmission helps but I still can average over 21 MPG on my new 426 stroker without MDS. 8 speed autos are the key IMO.
 

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On my '15 A8 SRT 392 I could get around 26 MPG when I wanted to. The MDS for the auto transmission helps but I still can average over 21 MPG on my new 426 stroker without MDS. 8 speed autos are the key IMO.
As in for only during bouts of Highway cruising at 55mph?
 

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My 16 SRT has ECO, starts in 2nd gear and has a different program to engage MDS sooner. Gets 28 mpg at 72 mph which is about the fastest I can go before MDS kicks out then the mpg drops to 24.


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And I should say that ECO is different than MDS. All automatic 392s have MDS but only SRT and 2019 Scat Packs have factory ECO mode, it was part of the SRT Performance Pages. (Tazer will get ECO on 15-18 Scat Packs).





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And I should say that ECO is different than MDS. All automatic 392s have MDS but only SRT and 2019 Scat Packs have factory ECO mode, it was part of the SRT Performance Pages. (Tazer will get ECO on 15-18 Scat Packs).





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And not to mention no gas guzzler tax :)
 

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But you pay for an 8spd that costs more then the tax....
I paid $400 more. Love the M6 but that was the best $400 I ever spent.



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My 6.1 does not have the eco. Its getting 13 no matter what lol. Maybe a little better on the freeway, but not by more than a couple miles per gallon.
 

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18 avg here, 6 spd, do not have the skip shift activated
 

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how much gas do you save with the eco mode? are you using less power like in valet mode?
 

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how much gas do you save with the eco mode? are you using less power like in valet mode?
Not much, maybe 1 mpg. Most of the savings comes from the MDS which will activate in most conditions whether you have ECO or not. It does start in 2nd gear in ECO so that saves a little but there is no lowered power, if you stomp it it will go.


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