Re: "ECO" display on Hemi-V8
You don't always get a resonance with MDS, especially at the low rpm and speed mentioned here. You can't tell if MDS is active or not simply by exhaust resonance. You may be able to feel vibration when MDS is activated a low rpm, perhaps with a bit of throttle, you will notice the MDS kick out upon acceleration. Because its so difficult to determine if MDS is active under some conditions, similar to how difficult to tell what gear the transmission is actually using, observations may be anecdotal. Not so sure what the right answer is, and how much of a difference it makes.