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eh.ohKate · 03-02-2013, 05:58 PM

So I've been reading a lot of conflicting information about the accuracy of factory installed fuel economy measurement devices. One study indicated inaccuracies as high as 19%(!) optimistic in some models. The study mentioned the 2010 Insight, which would be the one I want information on as the system is the same as in my CR-Z but it didn't mention data collected for that model (my hope is that means it was good and thus didn't fit the article.) On some forums I've read about the Honda computers actually being conservative in situations where they are off, which I take no issue with it's like setting the clock five minutes fast so you get to work on time.

That brings me to my question, do you guys have any information on this subject, are they all within the same ballpark of accuracy or are any of them definitively better?

03-02-2013, 05:58 PM	#1 (permalink)
eh.ohKate EcoModding Lurker Join Date: Mar 2011 Location: Moon, PA Posts: 16 2012 Honda CR-Z - '12 Honda CR-Z EX 90 day: 45.25 mpg (US) Thanks: 3 Thanked 4 Times in 4 Posts	Honda MID vs Scanguage vs other So I've been reading a lot of conflicting information about the accuracy of factory installed fuel economy measurement devices. One study indicated inaccuracies as high as 19%(!) optimistic in some models. The study mentioned the 2010 Insight, which would be the one I want information on as the system is the same as in my CR-Z but it didn't mention data collected for that model (my hope is that means it was good and thus didn't fit the article.) On some forums I've read about the Honda computers actually being conservative in situations where they are off, which I take no issue with it's like setting the clock five minutes fast so you get to work on time. That brings me to my question, do you guys have any information on this subject, are they all within the same ballpark of accuracy or are any of them definitively better?