Does a tune mess with accuaracy of the overhead mpg meter?

[DENALI]

Thinking about getting a tune for my 03 6.0 and remember way back when the 99's first came out the tunes were really messing withthe accuracy of the overheads. I was curious if this was still the case with the 03's and 6.0's Thanks

[caissiel]

I use the Scangauge to monitor fuel flow and when programing my truck with Max Energy by Hypertech the calibrations are off by as much as 43%. The MPG would indicate 143% of of the real value. I am able to recalibrate it at fuel fill up and after a few tank fillup the calibration is within 1%.

So If a programer is used I think you need a calibratable Lie O'meter.

[ToMang07]

Originally Posted by DENALI

Thinking about getting a tune for my 03 6.0 and remember way back when the 99's first came out the tunes were really messing withthe accuracy of the overheads. I was curious if this was still the case with the 03's and 6.0's Thanks

It's off to begin with...so whats the difference?

You should always hand-calculate it, otherwise.... it's wrong... end of story.

I have a handy little app on my phone I use to track all my fill up info, It takes the price of diesel, how many gallons, and odometer reading, then calculates MPG, average daily cost, average fuel economy, (overall) average cost per mile, per day, etc. Love it!

[07OUTLAW]

My factory MPG calculator (lie-O-meter) is ALWAYS within 0.2 MPG of my hand calculated figures.


Running an SCT w/ custom tunes, on an 07'

[Bubba88]

Originally Posted by ToMang07

It's off to begin with...so whats the difference?

You should always hand-calculate it, otherwise.... it's wrong... end of story.

I have a handy little app on my phone I use to track all my fill up info, It takes the price of diesel, how many gallons, and odometer reading, then calculates MPG, average daily cost, average fuel economy, (overall) average cost per mile, per day, etc. Love it!

whats the app??!?!?

[05charcoal6.0]

yeah whats the app?

[Dave]

Originally Posted by 07OUTLAW

My factory MPG calculator (lie-O-meter) is ALWAYS within 0.2 MPG of my hand calculated figures.


Running an SCT w/ custom tunes, on an 07'

Same here

[ToMang07]

It was "Gas Book Free" The station search doesnt work so great, but as far as record keeping, its awesome!

[sly1types]

My Lie o Meter is with in .5mpg running SRL++ and it's 1.5-2mpg low when I run SRL+, but it's dead on when it was stock.