The Official "My Gas Mileage *****" Thread

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3-LIB3RTYS-3

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Mar 28, 2022
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Nevada
I’m getting that kind of mileage on the highway myself. I’ve read here that I should change my upstream O2 sensors.
Unfortunately (or not :)), I’ve put a ton into this car so nearly everything is new.

Has anyone used a performance chip to improve fuel economy?
 
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