Hey guys stock 2015 f150 XLT fx4 and my trip computer was saying I averaged 17.9 mpg for my last tank. My fuelly app said I only averaged 17.2. Is this about the difference you all get? Or is some of yall's spot on??
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03-10-2016, 03:48 PM #1Member
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How accurate is the computer for MPG?
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03-10-2016, 07:08 PM #2Chief Moderator
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13'xlt 5.o here. And mine has been a few tenths off. 2-3 tenths tops.
Originally Posted by Cleveland48
5Star tuned.....
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03-10-2016, 07:25 PM #3Member
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Thanks Jersey_Joe! I'll just keep on checking it see if it gets any closer to the fuelly app. Which I don't know how good the fuelly app is. That may be the issue idk.
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03-10-2016, 08:46 PM #4Chief Moderator
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Np Originally Posted by Cleveland48
Lol
5Star tuned.....
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03-11-2016, 01:16 AM #5Senior Member
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You can calculate it by hand and get the exact numbers to see how accurate your computer is. Originally Posted by Cleveland48
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03-11-2016, 04:29 AM #6Member
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I'm going too next time just too see if they all are different lol.
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03-13-2016, 07:35 AM #7Junior Member
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My trip computer is always off too. Anywhere from a as much as a half gallon typically. Have seen it as high as a gallon off once before. Seems like it tends to be more off when it is almost all city driving for some reason. I always do Fuely anyways to keep track of fuel expense. The wife's car is always off too. The computer always seems to be optimistic, and not the other way around, lol.
2010 Lariat SuperCrew 4x4 5.4 | Royal Red Metallic | MaxTow | 3.73LS | 35% Tint | OEM Bug Guard | OEM Mud Guards | OEM Wheel Well Liners | Weather Tech Floor Liners | Access Lorado Tonneau Cover | Dee Zee Bed Mat | 88,000 miles
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03-13-2016, 03:06 PM #8Member
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Yeah my 4Runner was always pretty close anywhere from .1 to
.3 tenths. This one doesn't seem quite so close.
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03-16-2016, 04:33 PM #9Member
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Well I checked the computer today vs hand calculations and fuelly. My trip computer said I averaged 18.7 mpg over 438 miles. Well doing the math I came up with 17.5 and the fuelly app said 17.6. So it is definitely optimistic on the computers part. Which aggravates me a little.
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04-03-2016, 03:07 PM #10Junior Member
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The longer it runs, the more accurate it will be. That has been my experience.
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