20 Mpg!
Elder User
Joined: Mar 2007
Posts: 522
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From: Albuquerque
Originally Posted by Todd525
so let me get this straight. Out of your guys trucks, with both tanks, then your getting close to 800 miles before you actually have to fill it up again? if this is true, then mine is WAYYYYY bad as I am only getting about 440 miles before I have to fill BOTH tanks up again. This could be bad on me............
I dont fall in that category as I have 75 total gallons capacity with the upper toolbox tank plumbed into my middle tank. I could probably go 1200 miles on one complete fill up, front and rear. Have I ever filled them BOTH up all the way, the answer is NO. It would cost me 300.00 in fuel.
I am figuring that at 16 mpg.
Posting Guru
Joined: Nov 2006
Posts: 1,059
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From: Herndon KY
Originally Posted by Todd525
so let me get this straight. Out of your guys trucks, with both tanks, then your getting close to 800 miles before you actually have to fill it up again? if this is true, then mine is WAYYYYY bad as I am only getting about 440 miles before I have to fill BOTH tanks up again. This could be bad on me............
)
Post Fiend
Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
Originally Posted by tndiesel
Please tell me how to do it, seriously, I'm always open to learn new better ways.
Thread Starter
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Elder User
Joined: May 2007
Posts: 999
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Originally Posted by Cuda_jim
Nothing new, it can only be done 1 way, correctly that is. I assumed you were doing it backwards from your post. I'm so confused
Posting Guru
Joined: Sep 2004
Posts: 1,096
Likes: 2
From: Ohio
i cant believe that. I really need to do the 10k mod and the fpr shim to see if that helps any with mine. I can get 420 to 440 miles on a tank and 90 percent of that is IN TOWN driving, but people say that they squeeze 550 to 600 miles before filling is giving me P ENVY......... thats POWERSTROKE envy for all you pervs that thought I was talking about something else. LOL
Tuned
Joined: Jul 2007
Posts: 291
Likes: 0
From: Cookeville, TN
Originally Posted by Suber
I dont fall in that category as I have 75 total gallons capacity with the upper toolbox tank plumbed into my middle tank.
1. I believe this is Illegal to do.
2. I wanted to do this before I found out #1...
Elder User
Joined: Mar 2007
Posts: 522
Likes: 0
From: Albuquerque
Originally Posted by Mark62
2 thoughts on this...
1. I believe this is Illegal to do.
2. I wanted to do this before I found out #1...
1. I believe this is Illegal to do.
2. I wanted to do this before I found out #1...
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Cargo Master
Joined: Jul 2006
Posts: 2,756
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From: Nampa, ID
My '97 F350 SRW holds 18.2 gallons in the rear tank and 19.0 in the front tank. On separate occassions, I have run both tanks empty to see what they would hold.
The rear tank has taken up to 17.5 gallons to fill up and the front tank has taken up to 18.5 gallons to fill up. My driving is in-town and highway commuting. I normally switch to the front tank after the odo shows 280 - 285 miles. I'll go 10 miles farther on the front tank. That gives me a range 570 - 580 miles on both tanks before running out of fuel.
I shimmed the FPR and added Diesel Kleen this past weekend when I filled up. That was at 553 miles and about 33.5 gallons for an average of about 16.5 mpg. I'm generally in the 16.5 - 17.5 mpg range. I started towing a 24-foot travel trailer recently. On my trip from California to Idaho, I managed 12 - 13.5 mpg pulling through town and at highway speeds.
Math involved: ODOMETER reading divided by GALLONS at fill up equals MPG.
The rear tank has taken up to 17.5 gallons to fill up and the front tank has taken up to 18.5 gallons to fill up. My driving is in-town and highway commuting. I normally switch to the front tank after the odo shows 280 - 285 miles. I'll go 10 miles farther on the front tank. That gives me a range 570 - 580 miles on both tanks before running out of fuel.
I shimmed the FPR and added Diesel Kleen this past weekend when I filled up. That was at 553 miles and about 33.5 gallons for an average of about 16.5 mpg. I'm generally in the 16.5 - 17.5 mpg range. I started towing a 24-foot travel trailer recently. On my trip from California to Idaho, I managed 12 - 13.5 mpg pulling through town and at highway speeds.
Math involved: ODOMETER reading divided by GALLONS at fill up equals MPG.
Elder User
Joined: Dec 2004
Posts: 891
Likes: 1
From: Toulon,Il.
we need to keep one thing in mind.RPMs what gears,tire size are you running? The 3 .55s will definitly get better mpgs than 410s. Larger more aggressive tires will lose mileage and throw off odometer as much as10%.With all do respect mileage reports always taken w/a grain of salt..
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Elder User
Joined: May 2007
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Originally Posted by fuelman
we need to keep one thing in mind.RPMs what gears,tire size are you running? The 3 .55s will definitly get better mpgs than 410s. Larger more aggressive tires will lose mileage and throw off odometer as much as10%.With all do respect mileage reports always taken w/a grain of salt..
Post Fiend
Joined: Oct 2003
Posts: 5,903
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From: MICHIGAN
Originally Posted by tndiesel
De-confuse us all please and tell me/us the one correct way.
Senior User
Joined: Jan 2007
Posts: 260
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From: Whitewright, Tx
Guys, there is not much to get 20 miles to the gallon with these trucks. Mine is 2wd,235/85/16E tires, and has 410 gears. Nail the speedometer down at 60mph and get 20-21 mph all day every day. Just keep the motor below 2000 RPM.
Personnal best was in 1997 went in andout of the north rim of the Grand Canyon and up to Lake Powell got 22.3 MPG. 55MPH road.
Personnal best was in 1997 went in andout of the north rim of the Grand Canyon and up to Lake Powell got 22.3 MPG. 55MPH road.
Lead Driver
Joined: Aug 2006
Posts: 5,259
Likes: 17
From: Gambrills
Miles/Gallons=MPG....240/16=15
Originally Posted by tndiesel
Please tell me how to do it, seriously, I'm always open to learn new better ways.
Start with a complete fill up and reset the tripp od to 0. Drive until normal fill time. Fill it back up. and divide miles in to gallons. EXAMPLE...... Lets say you filled it up and reset the OD and drove 240 miles. You then filled the tank back up and it took 16 gallons. You got 15 miles to the gallon.
Miles/Gallons=MPG
240/16=15
BTW, this is my normal milage, any thoughts? besides to slow down.