Indicated MPG Error
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Joined: Aug 2010
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Indicated MPG Error
Is there a way to calibrate the indicated MPG so that the reading is more accurate? My indicated is optimistic by about 6%. Over about 3000 miles the indicated is 15.04 and the calculated is 14.21. Granted this is not great mileage but my truck scaled at 8970#.
2011 F350 6.7L CC KR 4x4 Dually
2011 F350 6.7L CC KR 4x4 Dually
Posting Guru
Joined: Apr 2004
Posts: 1,399
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From: Corinth, TX
mine seems to be a bit more optimistic when I "top off" the tank. I started letting the nozzle cut itself off, stopping there... and it's only off by about 1-2%. Pretty good considering it's an estimate
Postmaster
Joined: Sep 2006
Posts: 2,598
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From: Maryland
It's about as accurate as your fueling process. Can you guarantee that you are filling the tank to within ounces of the same capacity every single fill-up? Highly unlikely.
Filling up at the same pump every time, I have found like djjoshuad said that the fill capacity is relatively consistent and fills pretty close to full at the click of the nozzle. My 6.0 was a nightmare to get completely full. If I let the nozzle click off by itself and hang it up at that point, my hand calc has been within an acceptable deviance from the in-dash meter. My 6.0 was much the same way.
Filling up at the same pump every time, I have found like djjoshuad said that the fill capacity is relatively consistent and fills pretty close to full at the click of the nozzle. My 6.0 was a nightmare to get completely full. If I let the nozzle click off by itself and hang it up at that point, my hand calc has been within an acceptable deviance from the in-dash meter. My 6.0 was much the same way.
Elder User
Joined: Jul 2010
Posts: 642
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From: herriman utah
mine is off about .5 mpg each tank which after tank after tank would not show itself each time if it was a difference in fueling. I checked it fueling it to the point of having diesel actually run out the filler. anyways .5 mpg is way better than the 4+mpg my old dodge was off.
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brider
1961 - 1966 F-100 & Larger F-Series Trucks
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Jul 2, 2005 03:53 PM
