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      RacerRon replied to the thread 6.4l terrible mpg.
      I also have a 2021 2500 6.4. My mileage started improving substantially once I hit 20,000 miles. Is currently sitting at almost 17...
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      RacerRon reacted to crash68's post in the thread eco mode stopped ? with Haha Haha.
      6th gear is 1:1 (7 & 8 are overdrive gears) the downshift to 5th is 1.284:1 that's what your probably feeling, although you must be...
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      RacerRon replied to the thread Converter Catalytic Issue.
      I am under the impression that emission systems are under warranty for 150,000 per federal law. This should be covered.
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