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