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I just got back from a round trip Kansas City to Southeast Texas. I checked my MPG carefully and over a distance of 1246 miles I got an actual MPG of 27.56. DIC average MPG for the trip shows 29.8 for a difference of +8.4%.

Has anyone else checked theirs? Could I possibly have a leaky injector(s) resulting in burning unmetered fuel? I know it's not a huge difference but I was hoping it would be more accurate than that.
 

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Mine usually reads 2mpg higher than it actually is. Still good gas mileage though.
 

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I've never seen a difference of more than 0.4 mpg when the trip exceeds 500 miles or so.
 

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I'll be checking mine probably next week when I have to fill it up.

I hope I get better mileage than the DIC.
I think it is showing around 20mpg
 

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A week from today I'm leaving on a trip of about 2500 miles to NM, AZ and UT. I think I will do the comparison to see how close my DIC is. I have done as well as 30.2 MPG (DIC) on a 325 mile trip, but I didn't cross check it.
 
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