On my drive back to Chico....fwiw - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 10-15-2007, 07:01 PM Thread Starter
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On my drive back to Chico....fwiw

On my way back to Chico from Morgan Hill today (about 210 miles) I decided to see what some call the "lie-o-meter" had to say about what my mileage is. I had my dirtbike in the back and my dog in her crate so I wasn't empty but I wasn't loaded up with much either. I filled up before I left and had gone about 40 miles into my trip before I decided to reset the overhead computer. I was cruising at 65mph when I reset it and it immediately read at 19.2 then started dropping and settled at 17.5....until I started drafting behind an 18 wheeler that was going 55mph.(law in california) I was probably about 15ft behind him and felt like a granny but saw that my average miles per gallon were increasing on the "lie-o-meter". In about 30 miles it went from 17.5 all the way to.....21.1. I took a pic but it did not come out. damn leaf sprung truck. I had to stop at the tolls and it dropped to 19.5 after I took off. After that I continued to draft and drive like a granny and it got as high as 20.5 before eventually settling at 20.0 miles per gallon by the time I got off on my exit. One thing I did notice is that the milespergallon would climb if I was drafting and going 55mph but if I was drafting behind a truck doing 60mph they wouldn't climb and eventually dropped .2mpg until I started going 55mph again and it went back up .2mpg. As it says on the title of the thread this is a take it For What It's Worth thread. I'm not sure how accurate the overhead computer is but I don't call it a "lie-o-meter" and probably trust it more than most based on a post I read by bowtiehatr over on tdg.com a while ago. It made a lot of sense and he's a tech...so yeah. lol Now, for those of you that are interested in that "hand calculated" version I went through less then half a tank and went 210 miles. I don't think the truck had 29 gallons in it but it was "full". I doubt I got 20mpg but I like to think I got around 18mpg drafting those big rigs. After getting off the freeway there were a bunch of stop signs and taking off from a dead stop and by the time I got home it ended up at 19.2mpg. thanks for reading.

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post #2 of 12 Old 10-15-2007, 08:24 PM
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a friend of mine has an 06 F350 dually and he says that his "lie-o-meter" is dead nuts accurate everytime he checks his mileage.
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post #3 of 12 Old 10-15-2007, 09:24 PM
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haha -- thats awesome man! I did that one day and was in a construction zone for 10-15 miles... reset my computer and it was reading 25 MPG @ 50 MPH!!!

Just shows ya if you are willing to slow it down, you will get some GREAT mileage!

my lie-o-meter is less than 1MPG off when I check it by hand ... good enough for me!
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post #4 of 12 Old 10-15-2007, 09:33 PM
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yep same results for me to the most I have read on mine is 23.2 mpg on the interstate. with the cruise set on 70 . in the city its get about 15 to 17 .

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post #5 of 12 Old 10-15-2007, 09:33 PM Thread Starter
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yea mine is usually fairly close but now with the bigger tires and tune who knows where it stands. I hardly ever go through an entire tank so it makes it hard to know my actual mileage. I honestly think I get somewhere around 18 though. After I filled up today it said 387 to empty and that kinda sucked but when it was on the stock 31's it once read 612 miles to empty and that was nice. haha

2003 centennial edition f250 4x4 ccsb auto w/blackwater long block w/arp's, 4" exhaust, airaid intake, ODawg's manifold, itp's reg return, sap modified solenoid, DC power 185amp alt, motorcraft 850cca, Warn Hubs, RS 55w 6k hid's, harley headlights, bpd 58v 6 phase, bpd water pump, dieselsite coolant filter, elc coolant, php gryphon, Xcal2 w/unlimited tow, new hfcm, glowshift fuel psi gauge, icon level kit, 20" kmc hoss, 305/55 terra grapplers TOTALED
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post #6 of 12 Old 10-16-2007, 02:31 PM
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what size tank you got darsey ? i've never gotten over about 350 on a tank, and it's usually only about 310 per tank
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post #7 of 12 Old 10-16-2007, 02:33 PM Thread Starter
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29 galllon

2003 centennial edition f250 4x4 ccsb auto w/blackwater long block w/arp's, 4" exhaust, airaid intake, ODawg's manifold, itp's reg return, sap modified solenoid, DC power 185amp alt, motorcraft 850cca, Warn Hubs, RS 55w 6k hid's, harley headlights, bpd 58v 6 phase, bpd water pump, dieselsite coolant filter, elc coolant, php gryphon, Xcal2 w/unlimited tow, new hfcm, glowshift fuel psi gauge, icon level kit, 20" kmc hoss, 305/55 terra grapplers TOTALED
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post #8 of 12 Old 10-16-2007, 02:37 PM
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wow, me too. i'm on 35's with a 6" lift and i get 12 MPG usually. with the exception of a few trips on the hiway, all my tanks last between 300-320 miles.
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post #9 of 12 Old 10-16-2007, 02:46 PM
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Yeah, I never got why everybody calls it a lie o meter. Mine is usually within two tenths MPG of what I'm actually getting. It's a lot better than the one in my mom's brand new 40k minivan. That one is 2-3 MPG off normally.


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post #10 of 12 Old 10-16-2007, 03:58 PM
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how did you reset your computer, mine is waaay off
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