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View Full Version : Efficiency mode: an observation or two



Atrevido
10-12-2019, 08:25 AM
Curiosity got the better of me, and using an OBDEleven Pro I enabled “Efficiency” mode.
This is my DD, and I average 20.5 MPG, given a mix of about 60/40 highway/street driving.

Observation 1: the car feels like it got neutered! Your butt-dyno will be the first to tell you about the
definite lack of “oomph”. You can’t just blip the throttle and feel the rush. You slowly get used to it.

Observation 2: I got about 21 MPG, probably because I was subconsciously trying to coax it along.
As far as increased fuel efficiency, any number of factors could've come into play for an extra .5 MPG.

Conclusion: Just don’t do it; it's not worth it at all. Once I re-enabled Dynamic Mode my butt-dyno immediately noticed
the difference: the “get up and go!” had returned. My big wide goofy grin had returned. The world was right again.

2013S4
10-13-2019, 07:20 AM
Efficiency permanently opens the bypass, among other things like keeping it in the highest gear possible.

It does help on highway driving though as it keeps the car out of boost which is surprising easy to build up during highway driving, especially with higher ratio pulleys.

Before switching to a E blend, with efficiency mode enabled I got 34mph on long highway trips.