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There is no way that you can measure a one mpg change in fuel economy in the field. There are just too many variables to consider. A couple extra hard accelerations will change it that much.
MPG after PCM update
It was a month since my 2010 got the judder transmission recall PCM updated. I am experiencing slightly worse mileage from 21 to 20 mpg (~5%). I don't want to make this a big deal, I just notice because I have been doing the same routines every week. If that's the price to keep the TC healthy, I can live with it. I am just wondering if any others notice the same and what might be the reason behind it. Thanks!
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May be I am the exception but I was able to get 21mpg week in week out for the last year. And now I am again getting 20mpg every week consistently. May be I don't do hard runs, may be I have a boring life. :zzz: Anyway I just like to know if anyone else experience drop of mileage and what could be the reasons.
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