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  1. Engine & Drivetrain
    2011 Acadia Denali I drive the same miles to and from work. Same route every day but yet when I check how my fuel economy on my instrument cluster, one day it will show 10.6 MPG then another it will show 16.7. Any idea why it is so sporadic? Again I have changed nothing on the car in between...
  2. Gas

    I have a 2020 and the book says it recommends 87. What do you put in your tank?
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