RedlandRanger
Moderator
Short answer - it didn't last a whole tank - it wasn't for me for full time driving:Please let us know the result. I have not tested my Ranger on this, but my gut feeling is that "Superman" mode would have to cost us something is terms of mileage, but, even if so, it is well worth it for some kinds of driving. (I mainly use it for highway/freeway driving, moving back to "Dork" mode for city driving....)
https://www.ranger5g.com/forum/threads/im-addicted-to-s.4493/page-4#post-67791
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