fuel tank mileage..spartan tuned - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 06-28-2010, 01:04 PM Thread Starter
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fuel tank mileage..spartan tuned

Just curious whats everyone one getting to a full tank ?
My truck is spartan tuned 250 and filling up 32 gallons i was making 450-470miles to empty that was with stock tires. mixed driving(highway/City)
Now with 35" toyo mt im getting about 400.

Just curius if numbers match everyone elses or similar

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post #2 of 15 Old 06-28-2010, 01:23 PM
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In your fuel calculations, are you factoring in the difference in tire heights? Larger tires roll less revolutions per mile....so you would see less miles on the odometer.

How much heavier are the 35" MTs vs stock?


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post #3 of 15 Old 06-28-2010, 05:40 PM Thread Starter
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im not sure how much heavier but def heavier.

2005 F250 Harley Davidson C/C LB 4x4- ARP Studs, Elite EGR Delete, Hellaman Sump, Air Dog II, 6.4 Banjos, SCT w/ Tunes from Gearhead, Autometers, 4" MBRP Exhaust, Dieselsite Coolant Filter, RetroSolutions 6000K HID's, '08 Rear Leaf conversion from PMF with F350 blocks, AirLift 5000 AirBags , 2.5" Leveling Kit with bilstein shocks, 5% tints

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post #4 of 15 Old 06-28-2010, 06:10 PM
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Is that with the tuner? If you are getting less miles per tank with the 250 tune there is something wrong. I have 38 gallon tank and I have a 250 tune and I'm getting close to 700 miles a tank with goodyear duratrac 33 inch tires. Before the mods and tuner with the same tires I was getting 550-575 a tank. I mainly do hwy driving here in the Dallas area.


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post #5 of 15 Old 06-28-2010, 06:13 PM Thread Starter
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My tank suppose to be 38 too but never fill up past 32 gallons.
My lie-o-meter tells me 700+ miles but properly calculated 450+ with stock tires.
are you refering 700 to lie0meter or is that properly calculated with deleteing trip to 0 when you fill up.?

2005 F250 Harley Davidson C/C LB 4x4- ARP Studs, Elite EGR Delete, Hellaman Sump, Air Dog II, 6.4 Banjos, SCT w/ Tunes from Gearhead, Autometers, 4" MBRP Exhaust, Dieselsite Coolant Filter, RetroSolutions 6000K HID's, '08 Rear Leaf conversion from PMF with F350 blocks, AirLift 5000 AirBags , 2.5" Leveling Kit with bilstein shocks, 5% tints

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post #6 of 15 Old 06-28-2010, 06:14 PM Thread Starter
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im getting less because im running a 35" mud tire now, which is normal to lose 1-2mpg

2005 F250 Harley Davidson C/C LB 4x4- ARP Studs, Elite EGR Delete, Hellaman Sump, Air Dog II, 6.4 Banjos, SCT w/ Tunes from Gearhead, Autometers, 4" MBRP Exhaust, Dieselsite Coolant Filter, RetroSolutions 6000K HID's, '08 Rear Leaf conversion from PMF with F350 blocks, AirLift 5000 AirBags , 2.5" Leveling Kit with bilstein shocks, 5% tints

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post #7 of 15 Old 06-28-2010, 06:20 PM
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Quote:
Originally Posted by Darektylka View Post
My tank suppose to be 38 too but never fill up past 32 gallons.
My lie-o-meter tells me 700+ miles but properly calculated 450+ with stock tires.
are you refering 700 to lie0meter or is that properly calculated with deleteing trip to 0 when you fill up.?
Yeah that is hand calculated. The last time I filled up I figure that I avg 19.7 for that tank. I went about 675 miles I believe and put in 34 gallons. Hell I still had 4 gallons left but I don't like to run below a 1/4 of a tank too long. Right now I'm at 300 miles on my trip meter and I'm between 3/4 and 1/2 a tank. My lie-o-meter is saying I'm avg 21.7 mpg which I think is pretty close to what I'm really avg. I mainly do hwy driving and I don't go above 70 mph. I mainly just drive around 60-65 mph.


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post #8 of 15 Old 06-28-2010, 06:24 PM Thread Starter
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I mainly do city driving so theres my problem not getting 600+ to full tank. with stock tires me lie0meter was 20-21 also but hand calculated i was getting 17ish and 90% of that was city driving.

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post #9 of 15 Old 06-28-2010, 06:29 PM
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Yeah you have to have a 38 gallon tank cause there are only two tank sizes. 30.5 gallons and 38 gallons. So if you are putting in 32 gallons....


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post #10 of 15 Old 06-28-2010, 06:32 PM
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How many miles should one add to full tank miles when running 35's? For instance, if my odometer says I went 400 miles, how many miles have I really gone if running 35's? Because I typically get between 300-400 miles to a tank depending on speed, type of driving, etc..

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So all that work and you're keeping the trash can of doom on the exhaust?

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