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post #31 of 65 (permalink) Old 08-10-2010, 09:10 PM
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Re: Hand Calculated Mileage figures, post them here!

17.61 mpg (hand-calculated city and highway)

13.25 mpg (hand-calculated city and highway with 10K trailer)

*F-250 Lariat, crew cab, short bed, 4wd.

'97 F-350
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post #32 of 65 (permalink) Old 08-11-2010, 02:46 AM
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Re: Hand Calculated Mileage figures, post them here!

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Originally Posted by Abrannan19 View Post
after my new AFE intake installed, I filled up to the brim, had 4 regens and filled up today, hand calculated mileage was 17.4mpg which is up about 1mpg from what I was typically getting before the intake. This was about a 50/50 split with highway and city driving. With a road trip, I think it would be even better.
thats about right from all i have read and from my friends figures!

most after market intakes will get you 1 MPG better than stock ....

Some only .5 but most are showing 1 MPG better,and thats Ford or chevy

To get 3-4 MPG better you got to Do the CAI,Exhaust,and tunner thats my findings anyway....
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post #33 of 65 (permalink) Old 08-11-2010, 03:06 AM
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Re: Hand Calculated Mileage figures, post them here!

I have a 2000 7.3, but I also have some education in statistics.

From your data you guys have submitted on your trucks which have a lot of different variables here is what I can dig out.

Non-Towing MPG is between (15.3 and 17.2)

Towing MPG is between (10.6 and 13.3)

The data suggests the trucks onboard computer is higher (0.022 to 1.000) mpg compared to your hand measured mpg.

With more data I will be able to determine a lot more.
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post #34 of 65 (permalink) Old 09-13-2010, 01:43 AM
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Re: Hand Calculated Mileage figures, post them here!

1,600miles 3.55gears

14.3 (City) 16(highway) 65-70mph(18-19mpg)

Is it just me or does the Fuel Guage needle tend to drop quicker at the last quarter? When the Reserve light turns on, I hand calculate to have about 7-8 gals still left in the tank...
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post #35 of 65 (permalink) Old 09-13-2010, 02:05 AM
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Re: Hand Calculated Mileage figures, post them here!

I would be very careful with that assumption. I thought that initially on my 6.0 until I found out that what I thought to be a full tank was really 5 gallons shy unless you spent an extra 5 minutes feeding it fuel at a very slow rate.
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post #36 of 65 (permalink) Old 09-15-2010, 06:49 PM
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Re: Hand Calculated Mileage figures, post them here!

delivered a load of hay this weekend, was a 24 foot bumper pull trailer, weighing 4,000 lbs plus 12 very wet ( load got 2 inches of rain on it overnight) round bales. got 8.9 hand figured, 125 miles loaded drive. return trip got 13.2 empty with 3.31 gears. the load squatted it pretty bad, i'm interested in air bags as well.

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post #37 of 65 (permalink) Old 09-16-2010, 04:18 AM
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Re: Hand Calculated Mileage figures, post them here!

I like the feature where I can watch my mpg for the last 5, 10 or 20 minutes. Here is a picture I took on my way through Mississippi on I-59. Probably had close to 100 miles on the tank and went through a regen right after filling up and getting back on the highway. My computer has been a constant .5mpg off. So I am running around 78mph and getting 17 - 17.1 mpg. This is me, the dog and all the crap I carry to work in a refinery for a month in NOLA. I'll take this mpg all day long. I have also found that after the initial click on the fuel pump it takes only a minute or 2 max to fill it to the neck where as my 05 and 08 would take another 10 minutes.


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post #38 of 65 (permalink) Old 09-16-2010, 11:02 PM Thread Starter
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Re: Hand Calculated Mileage figures, post them here!

ok, so before the flash with the wheels I really wasn't keeping up with what MPG the truck was getting. So I now have the flash and I have 22's with 35" tires. My ODO is off because of the larger wheels. I went by interstate mile markers to see approx how far it was off, I only had a 7 mile span from where I started to where I had to get off. So in 7 actual traveled miles according to mile markers, my ODO only showed 6 on the button. So according to my calculations that puts my ODO off by .1428571 per mile shown.

I filled up today topped it off even shook the truck to get the extra tenth of a gallon in with a total of 18.73 gallons

Here is what my dash readings were:

260 miles traveled
8.21 hours
18.1 gallons used
14.3 mpg

my math

260x.1428571 = 37.14

Actual miles

260+ 37.14 = 297.14

297.14/18.73 = 15.86 mpg

I don't think that's too shabby for 22's and 35's and not cutting it any slack. In this time I was WOT to 85ish for about 1.5-2 miles, so that didn't help any.

I will try get some more info soon.
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post #39 of 65 (permalink) Old 09-17-2010, 02:59 AM
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Re: Hand Calculated Mileage figures, post them here!

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Originally Posted by surveyor13 View Post
I like the feature where I can watch my mpg for the last 5, 10 or 20 minutes. Here is a picture I took on my way through Mississippi on I-59. Probably had close to 100 miles on the tank and went through a regen right after filling up and getting back on the highway. My computer has been a constant .5mpg off. So I am running around 78mph and getting 17 - 17.1 mpg. This is me, the dog and all the crap I carry to work in a refinery for a month in NOLA. I'll take this mpg all day long. I have also found that after the initial click on the fuel pump it takes only a minute or 2 max to fill it to the neck where as my 05 and 08 would take another 10 minutes.

Thats a great fuel burn...With my 6.7 (3.55's) Im avg. about 15.5mpg @ 80mph. I think its still to EARLY for me, less than 2k on the truck.

You guys gotta love that WOT @ ONLY 2,250-2,300 RPM!
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post #40 of 65 (permalink) Old 09-17-2010, 03:05 AM
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Re: Hand Calculated Mileage figures, post them here!

Quote:
Originally Posted by Abrannan19 View Post
ok, so before the flash with the wheels I really wasn't keeping up with what MPG the truck was getting. So I now have the flash and I have 22's with 35" tires. My ODO is off because of the larger wheels. I went by interstate mile markers to see approx how far it was off, I only had a 7 mile span from where I started to where I had to get off. So in 7 actual traveled miles according to mile markers, my ODO only showed 6 on the button. So according to my calculations that puts my ODO off by .1428571 per mile shown.
Adam it's not that I doubt your calculations, but your truck came with 34.1" tall tires and you now have 35" tall tires. The actual difference is likely to be more in the 3-4% range not 14%. The math just doesn't add up.
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