OK, I have a PSD and wasn't expecting to get awesome mileage out of it. I was told by some people that they've seen up to 20mpg while on highways with no load. OK ... I tried it and the best I EVER got was 18 going downhill coasting for about 40 miles. People were always like, "Don't get a gas engine to tow with because you'll get crappy mileage. I tow my Jeep with a gas engine and I only get 8mpg!" So I get the PSD and tow with it and the best I've EVER had was 9.4mpg with the Jeep and trailer on the back. Not to mention that to go faster than 80mph with the Jeep behind me is pretty much impossible.

So my brother needs a tow rig. He wants something that gets better mileage than mine and everyone is like, "Get a Cummins! I have a cummins and get 20mpg when I'm not towing and like 15 when I am." So he gets a brand new Cummins and gets 10mpg towing his Toyota and 14 under no load. I don't know how fast he can go towing, but Lance posted that pic way back of his speedo in his Cummins doing 100mph towing. Pretty damn good for an engine with 2 cylinders less than mine????

So I run into a few Duramax owners on my way to and from RCAA in Alabama. I ask them what kind of mileage they're getting. They all claim 30mpg with no load and 20 with a 40 ft. camper behind them. Oh, and get this ... one of them says that, with his 40 foot caper, he can EASILY do 100mph and he says the engine is just asking for more. He estimates he could get up to 140mph without the governor!!!! WTF!

So are all these people lying? Is there something wrong with our trucks? Should I buy a Durmax? I want to know WTF it seems like my brother and I are the only ones on the planet not getting 50mpg doing 150mph with a 100 foot doublewide behind us? :mad: :mad:

J. J.

My brother got the same out of his dodge, with a chip and exhaust he is getting mid 20's MT and high teens loaded now. I have seen a big difference between the manuals and auto's though.

I guess it is the same reason my first TJ got 24 mpg and my second one (exact same set up) same year, gears, equipment etc only got 17-18. I never could figure that out.

Originally posted by patooyee


So I run into a few Duramax owners on my way to and from RCAA in Alabama. I ask them what kind of mileage they're getting. They all claim 30mpg with no load and 20 with a 40 ft. camper behind them. Oh, and get this ... one of them says that, with his 40 foot caper, he can EASILY do 100mph and he says the engine is just asking for more. He estimates he could get up to 140mph without the governor!!!! WTF!

So are all these people lying? Is there something wrong with our trucks? Should I buy a Durmax? I want to know WTF it seems like my brother and I are the only ones on the planet not getting 50mpg doing 150mph with a 100 foot doublewide behind us? :mad: :mad:

J. J.

It's amazing that you even understood what they were saying since the size of the crack-pipe they were choking on must have made it incredibly difficult to speak.

mileage is gonna vary depending upon the gears and transmission you're running. Most of my buddies running auto PSD get 17-18 in town... 10-12 towing... no 4.10 gears or anything... all higher geared. My CTD non-HO auto with high gears was getting 17 in town (90K+ miles on it) and 10 towing. All these are based on non-modified trucks.

Got to DTR and hangout... it's got all three brands now and you can get some decent info with much less BS

30MPG! whaaaaaa must have been some good chit!:D

Originally posted by thump93yj
mileage is gonna vary depending upon the gears and transmission you're running. Most of my buddies running auto PSD get 17-18 in town... 10-12 towing... no 4.10 gears or anything... all higher geared. My CTD non-HO auto with high gears was getting 17 in town (90K+ miles on it) and 10 towing. All these are based on non-modified trucks.

I'm running an auto with 3.73 and if I EVER got 17-18mpg in the city, I would first puke in amazement, then pray to god in thanks for the blessing and ask him to let it continue, and then never stop driving it in fear of it going back down again. And if I got 10 - 12 towing, I would shit my pants and pull over to clean it up. No joke. Right now, if I get 13 in the city and 10 towing I am amazed. The only mod I have is a K&N filter.

My brother has the 6-speed manual with 4.10's and a K&N.

J. J.

Lighten up on the skinny pedal leadfoot. Aggressive driving kills your mileage. Why would you want to go over 80 towing?

BTW alot of people lie about the mileage they are getting and about how much power they have so they can feel good about their choice of truck.

Are you looking at the POS mileage computer in the truck or actually doing the math after each fillup?

Not sure on the Ford's... but on the Dodge... my city mileage started around 14 when it was new and climbed up as I got more break-in on the motor.... it started hitting 17 consistently after 75K miles on it.

Originally posted by patooyee
My brother has the 6-speed manual with 4.10's and a K&N.

J. J.


4:10's kill his mileage and the auto kills yours. Mine is getting right at 14 towing 10,000 #'s. And 19 empty. This is calculated by hand. Stock tires 3:73 gears and a 6 speed HO with a chip and intake.

Mine got 15 empty, 10 towing the same setup stock with low miles. They take time to break in. Mine now has 17,000 on it. Plus with the chip it gets better mpg.

I don't go over 80, I was just using it as an example. I am reading off the computer measurement on the roof. I will measure by hand next tiem I fill up. I'm going on 60k miles.

J. J.

I have an 03 HO 6spd Cummins 3.73 3500 dually Edge EZ (set on level 2) AFE intake full 4" exhaust. I just got back from Moab on Tuesday and got 12.7 mpg average, I set the cruise at 77 mph on the flats and ran 60 up the passes. I tow a 12' inclosed trailer for work around town and I get 14.5 to 15 mpg. The truck know has 7800 miles on it.

Scott

Edit: Gross weight was about 16K

Originally posted by patooyee
[B I am reading off the computer measurement on the roof. I will measure by hand next tiem I fill up. I'm going on 60k miles.

J. J. [/B]

LOL your kidding right? Really then you have no real figures to go off of and have nothing to complain about. Don't make me go get DRM and sick him on you. :flipoff2:

Originally posted by MattS


LOL your kidding right? Really then you have no real figures to go off of and have nothing to complain about. Don't make me go get DRM and sick him on you. :flipoff2:

You don't need to go get DRM, but I will make you make up for that useless post by posting a useful one that tells me why that reading is so innacurate.

J. J.

Think about it... that computer is just taking a reading off the fuel guage... which is reading a sending unit which is measuring a tank full of liquid (fuel) sloshing around and comparing it to your speedo and making a VERY estimated calc of MPG.

Verses... you fillup your tank, drive X miles, fillup your tank again... then accurately calculate mileage... no estimates involved there.

that mileage computer is almost as useful as the lighted vanity mirror! Hell the outside temp thermometer in the damn things isn't even that accurate... why would the mpg computer be?

Originally posted by thump93yj
Hell the outside temp thermometer in the damn things isn't even that accurate... why would the mpg computer be?

LOL! ... good point.

J. J.

Ok, now I'm REAL dissapointed! My mpg figures drop even lower if I divide miles by gallons!! :(:(:(

J. J.

Originally posted by patooyee
Ok, now I'm REAL dissapointed! My mpg figures drop even lower if I divide miles by gallons!! :(:(:(

J. J.

Mine got better. :p

Originally posted by MattS


Mine got better. :p


Mine right now is just over 15mpg, but it's new, stock, got 4.10's,
and I romp on it. :D :D

Mine's on its first tank of fuel.... :flipoff2:

got 250 miles on it and still half a tank showing... good sign.

Originally posted by thump93yj
Mine's on its first tank of fuel.... :flipoff2:

got 250 miles on it and still half a tank showing... good sign.

LOL it wil drop like a rock after 1/2 tank. :flipoff2:

This is all so fubar. Mine has 60k miles, 3.73 gears, I don't romp on it much, the tank goes fast for the first half and slow for the second, and I get 9mpg in the city according to my calculations. :confused: :confused: :confused:

My calulations have to be off. I'm going to go fill up and run it dry and see where it ends up.

J. J.

Originally posted by MattS



4:10's kill his mileage and the auto kills yours. Mine is getting right at 14 towing 10,000 #'s. And 19 empty. This is calculated by hand. Stock tires 3:73 gears and a 6 speed HO with a chip and intake.

Mine got 15 empty, 10 towing the same setup stock with low miles. They take time to break in. Mine now has 17,000 on it. Plus with the chip it gets better mpg.


My dad's 2500 4x4 auto get's 19 unloaded, 14-15 loaded with 10k+.

His older 1 ton 2wd auto got 21 unloaded and 17 loaded with 10k. Those all seem to be pretty standard figures. I think driving style has a LOT to do with it.

No mods.

19.3 mpg towing a 18ft boat.

Gotta love the PSD

Mike

I have a 01 PSD with 3.73 and stock tires and I get 12 - 13mpg around town and 17 - 18mpg on the freeway and 14 - 15mpg towing about 4K on the freeway, I have not done any long trips while towing my blazer yet but I bet I would be lucky to see 10mpg while towing that thing.
:usa:

How did I miss this thread? :laughing:


In short - YES - they are lying.



MattS nailed it - the computer is not necessarily correct.



Step 1: drive down the interstate, and check your odometer against mile markers. The further you can drive, the more accurate the calculation is. You may find you drove 10.5 miles, and your odometer reads 10 miles. Remember that difference - you will keep using that figure.

Step 2: Now you know how far off your odometer is, so you can do some math to get the REAL miles you drive per gallon.

Step 3: Get a mileage log book at your local office suppy store - they are under a dollar :p

Step 4: Start recording :D

At every fill-up, record odometer reading, and how much gas you put IN the tank. Make sure you don't "top off" the tank, or it will screw with your readings.

Now it is just a matter of math - first correct your mileage, then take the gas USED between tanks and you can now get your CORRECT mpg figures.


Good luck :)

Originally posted by DRM
How did I miss this thread? :laughing:


In short - YES - they are lying.



MattS nailed it - the computer is not necessarily correct.



Step 1: drive down the interstate, and check your odometer against mile markers. The further you can drive, the more accurate the calculation is. You may find you drove 10.5 miles, and your odometer reads 10 miles. Remember that difference - you will keep using that figure.

Step 2: Now you know how far off your odometer is, so you can do some math to get the REAL miles you drive per gallon.

Step 3: Get a mileage log book at your local office suppy store - they are under a dollar :p

Step 4: Start recording :D

At every fill-up, record odometer reading, and how much gas you put IN the tank. Make sure you don't "top off" the tank, or it will screw with your readings.

Now it is just a matter of math - first correct your mileage, then take the gas USED between tanks and you can now get your CORRECT mpg figures.


Good luck :)

Good idea. I'll buy a book tomorow before I fill up.

J. J.

If you want a more accuret check on your "fuel milage" Record every fillup in a note book and then add 10 or more fillups and divide my the total miles driven for those fillups.

I have a 3"x5" ruled notebook in the glovebox of my '95 that has every gallon of gas I've bought for it. Every car or truck we own has its own book.

I don't drive mine every day (95 powerstroke, 3.55's, auto), but I check the mileage about half the time. I get an honest 18 mpg empty driving like crazy, and have gotten 19.5 several times. Towing my Jeep, the best I ever got was 12 mpg. Usually around 11 and this is in the flats of Northern Indiana. My buddy has a 03 Powerstroke with the 6 speed and 3.73 gears. He drives his pretty hard too, and averages 17 mpg empty and 10 loaded.

Originally posted by 70~K5
If you want a more accuret check on your "fuel milage" Record every fillup in a note book and then add 10 or more fillups and divide my the total miles driven for those fillups.

I have a 3"x5" ruled notebook in the glovebox of my '95 that has every gallon of gas I've bought for it. Every car or truck we own has its own book.

I find the mileage books work well (you may have to modify the column headers to fit your needs), plus - the smaller mileage books stash easily above the visor.

Single tank numbers can vary a lot, like you said averaging over time is the best way to get acurate figures.


Also, you may want to note if you were running empty, or pulling a lot of weight, etc so you can look back later and see what scenerio's are affected by what you were using the truck for at the time :)

We got our 01 PSD X in May and it's averaged just over 14.5mpg over 4K miles. It get's about 12 towing a flatbed with our 4Runner on it (6000lbs), 17 and change on the highway, and 14 -15 around town. It has 285/70's and a HyperTech III program. For some reason, the overhead guage is fairly accurate. The odometer is a percent or two off which would tend to bump the mileage figures up marginally.

I didn't see it mentioned in the thread, but there really seems to be something to the "keep it under 2000rpm" thing. I think I might be able to get 20mpg on the highway if I could drive 60mph all the time. I tend to drive it fairly conservatively, but I'm a "5 over" guy by nature, so I don't poke around.

There are lots of threads on the dieselstop site about increasing mileage. I don't think most of the mods would ever pay for themselves, in a purely financial sense, but many of them do make these things even more fun to drive. :D

Mark

Just to throw another Dmax at you, in my '03 2500HD w/ just over 10k, I get typically 20 on the highway unloaded. Almost 15 mpg towing my jeep on a super light trailer. There is no mileage computer in my truck, so these are all hand calcs. I used a much heavier utility trailer before and got a few less MPG with it. I typically drive very conservatively because I'm too cheap to spend all that money on fuel! ;) This is from a bone-stock truck too. 3.73 gears, 31" tires, Allison automatic. I do have plans for exhaust, intake, and most likely a programmer though.

Another thing you need to consider is altitude. Although a turbo makes this less of a concern, it still must be taken into account. I live @ 1000' above sea level, and usually don't drop below 500'.

Also, when it was new, I got less than 10mpg towing, and I think in the mid teens unloaded. It has definitely improved with the break-in.

My 00 CC Auto 3.73 4" exhaust PS with 32" tires gets about 13 in town empty. The best it ever got was 17.2 on a slow road trip empty when it had less than 2000 miles on it. On the highway it gets 12-13 towing 5000-8000# or around 15-15.5 empty. I am always pushing it on the highway whether it is loaded or empty.

My speedo is dead on with the current tires but the odo is off by about 4% per my GPS. The figures were calculated based on the corrected milage.

Originally posted by DRM
Step 1: drive down the interstate, and check your odometer against mile markers. The further you can drive, the more accurate the calculation is. You may find you drove 10.5 miles, and your odometer reads 10 miles. Remember that difference - you will keep using that figure.

Unless you're in Cali. No mile markers. Well, not any that are easy to find. You can use the phones on the side of the freeway. Another method is to use a GPS.


Make sure you don't "top off" the tank, or it will screw with your readings.

What? How's is topping off gonig to screw with the calculations? It's the only way to ensure a relatively close known level.

I top off on every tank and get consistant readings. I also top off because the pump shuts off with 5 gallons to go. It seems pretty damn stupid to start with 5 gallons missing.

Originally posted by eurobob


What? How's is topping off gonig to screw with the calculations? It's the only way to ensure a relatively close known level.

I was wondering about that also. Top it off or not, you're measuring how far you went on how much diesel you put in, so it shouldn't matter either way.

J. J.

do you have gauges????

i tow with a '01 CTD 6sp 3.54gears.
if i dont tow in that "sweet spot" which in my case is about 2100-2300 rpm...my mileage goes to shiat.

the differnce in EGT from towing at 2100 rpm and dropping down to 1750-1800 was fairly substantial.

and not to start a brand war....but it seems from what ive read on the PSD...they can ofter have injectors that are nowhere near 'matched'. im talking wacky flow rates. that has got to be a big factor in crappy mileage. then again..ive seen over on the TDR board big differences in peoples mileage also.

for me...keep off the smoke pedal and keep it spinnin' around 2200 rpm gets me good mileage.

Originally posted by eurobob
Unless you're in Cali. No mile markers. Well, not any that are easy to find. You can use the phones on the side of the freeway. Another method is to use a GPS.

That works too.


What? How's is topping off gonig to screw with the calculations? It's the only way to ensure a relatively close known level.

I top off on every tank and get consistant readings. I also top off because the pump shuts off with 5 gallons to go. It seems pretty damn stupid to start with 5 gallons missing.

Basically, unless you can physically see into the tank, you have NO WAY of knowing if you are putting the same amount of fuel into the tank at every fill up. You are solely reliant on the fuel shut-off sensor.

"topping off" generally means you have the punp set to auto, then it "clicks" off when the sensor tells it to. Now, if you always add another .75 gallon after that first click, then you are fine. But if you click, then click again, then again, and nex ttime you don't, then next time you click till it is spilling out the filler neck - then you are NOT getting consistent readings on how much fuel you are using.

Because of that, the easiest method is to always just stop pumping with the first click of the sensor. Yes, the sensors at different pumps may have a different reading, but you gotta work with the system you have :)

Anyway, in short: if you top off the same volume of fuel after the first click each time, then you are doing the same principle I was operating under when I said "don't top off".

Originally posted by DRM


Basically, unless you can physically see into the tank, you have NO WAY of knowing if you are putting the same amount of fuel into the tank at every fill up. You are solely reliant on the fuel shut-off sensor.


Unless I'm at the truck stop I can see in. The nozzles on the pumps for the big rigs are larger than the ones for cars. I can still fill it to the top though.

Oh, BTW, when you said top it off, I thought you meant going till it's nearly spilling out. It's illegal to do that in Cali. They have stickers on the pumps that say no topping off. I didn't realize you were doing the Tennessee top off.

Originally posted by DRM


Basically, unless you can physically see into the tank, you have NO WAY of knowing if you are putting the same amount of fuel into the tank at every fill up. You are solely reliant on the fuel shut-off sensor.


Unless I'm at the truck stop I can see in. The nozzles on the pumps for the big rigs are larger than the ones for cars. I can still fill it to the top though.

Oh, BTW, when you said top it off, I thought you meant going till it's nearly spilling out. It's illegal to do that in Cali. They have stickers on the pumps that say no topping off. I didn't realize you were doing the Tennessee top off.:flipoff2:

96 5 speed 2WD F350, normally gets 13 around town. Drove for a full tank like my Grandma, completely out of the boost, 18mpg.
I get 12-14 towing from the Colorado front range over the hills to Moab, and still get 14 running down the flat to Penrose. :confused:
20 would be nice... at least once...

Originally posted by eurobob


Unless I'm at the truck stop I can see in. The nozzles on the pumps for the big rigs are larger than the ones for cars. I can still fill it to the top though.

Oh, BTW, when you said top it off, I thought you meant going till it's nearly spilling out. It's illegal to do that in Cali. They have stickers on the pumps that say no topping off. I didn't realize you were doing the Tennessee top off.

So you are filling it up until it is all the way up in the filler neck, at the same level every time? :confused:

grades in deisel matter also.. i always try to use the same fill tank at the same station.. this will also get you close to better numbers...

my old F-250 - 99 CC 2wd 4.10's 6 spd manual 120k.. got 18 around town.. 20 hwy if i kept it under 70... 70 or over it drop down to 18.. towing 6k worth of jeep/trailer 13 mpg..

i just picked up my new F-250 - '03 Super Cab 4wd 5spd Auto with 3.73's under 1k.. and im still on my first tank.. so ill report in later..

Yeah most of the guys are lying about their mileage. I have checked mine about every other tank and every tank when loaded. Here is my truck, 2002, F350, CC, 4x4, 6spd,lwb, with 20k for miles. The only mods are k&n filter insert and Walker BTM muffler and pre-pump mods. I get 15-16 in town with my wife driving it like she stole it. 19-20 on the road empty. And 12-14 with the 10' Lance Cabover. My mileage stayed the same with the cabover and towing the 4-runner on a car trailer. The worst I ever got was 10 mpg when I got some crappy diesel in the middle of nowhere with cabover and towing. When my in-law's are driving they get about 12 with the cabover. So I average about 600 miles to a tank empty and 400 miles loaded. Unsure why you are lacking any power, the only thing that I can say is go to thedieselstop.com and learn all you can. It's like this site for the fords.

I dunno:confused:
I get 19-20mpg unloaded w/ my Dodge/Cummins on the interstate. It's a 6spd, HO, 4x4. I have an EZedge 'chip'. That is supposed to throw off the mileage computer a little, but say it makes the computer 10% off, that's still 17-18 mpg.

wasn't somebody compiling gas log/mileage info here? was it you DRM? i have a '97 PSD 4x4 CC w/ 4" down pipe and exhaust and no cat, i think 4.11's and i know 305 75's. i have mileage logs from January when i bought it for every tank. the speedo is off 5%, and i assumed the odometer would then be the same, but i'll check it next chance. i will also calculate all the mileages (no i haven't divided them all out yet). i'm in the neighborhood of 15mpg with a mix of town and highway unloaded and 10-12 w/ 6000# load.

i will donate my recordings for whoever was compiling the info.
Shawn

Originally posted by patooyee
I am reading off the computer measurement on the roof.

You can NEVER trust those things. Calculate it manually and you will get the correct figures.

Originally posted by DRM


So you are filling it up until it is all the way up in the filler neck, at the same level every time? :confused:

I fill it up until you can't get another cup in. That last 5 gallons takes nearly as long as the first 33.

Originally posted by BionicCruiser
wasn't somebody compiling gas log/mileage info here? was it you DRM? i have a '97 PSD 4x4 CC w/ 4" down pipe and exhaust and no cat, i think 4.11's and i know 305 75's. i have mileage logs from January when i bought it for every tank. the speedo is off 5%, and i assumed the odometer would then be the same, but i'll check it next chance. i will also calculate all the mileages (no i haven't divided them all out yet). i'm in the neighborhood of 15mpg with a mix of town and highway unloaded and 10-12 w/ 6000# load.

i will donate my recordings for whoever was compiling the info.
Shawn

YES! :bounce:

Feel free to email me the log info, and if possible - a picture of the truck itself! Thanks! drm@4x4spot.com

Originally posted by Paul Gagnon


You can NEVER trust those things. Calculate it manually and you will get the correct figures.

Part of this post was to try and determine what those "correct figures" are. I've only had time to log one fillup so far and the calculation was only higher than what the comp reads on the roof by .5mpg. Woohoo!

J. J.

mileage depends heavily on how heavy your lead foot is the higher the rpm the more fuel required to maintain the speed not to mention you take most boats ie fishing, ski, john they may weigh 3500 lbs but they sit behind the truck and for the most part are lower than the tailgate for the newer trucks especially 4wd trucks so the air drag on the trailer is less not to mention the boat is designed to cut through water so it will cut through air better. folks with camper shells will see better mileage due to loosing drag of the tailgate for dd and then when towing if you have a truck on a trailer then most likely the air is only going to hit the winshield of the rig on the trailer instead of the entire brick wall of the wheeler I've got a 90 ranger had a shell on it when I got it got 22.6 average of over 2k miles mostly highway (its a 2.9 v6) take the shell off and lost about 1.8 mpg for an average of 2k simple driving style can account for a significant change in mileage ususally drive down the hwy at 60-70 pure hwy driving yields 24 mpg when crusing 75-80 mpg drops to 17-18

if you want to see how much your lead foot changes your mpg a crude way is to either buy a mpg guage from jc whitney which will measure fuel flow rates to the engine to give you a pretty good estimate or go test drive a bmw or benz I know bmw's at least newer ones have a mpg guage built into the dash it gives you a pretty good idea and see what changing the speed does to the mpg on that guage they are pretty accuate since the entire engine is comptuer controlled and they actually meter fuel into the engine and the fuel return line and can determine the fuel consumption down to the cc this is also used in calculation for the onboard mpg average display so not all are as inaccurate as has been said

Originally posted by DRM
So you are filling it up until it is all the way up in the filler neck, at the same level every time? :confused:

I don't know about everyone else but since I run a diesel if I stopped at the first click every time I would never be filling the tank. Diesel foams bad when pumped. I usually get another 4-5 gallons after the first click. Let it settle a while and continue filling. :D

Originally posted by MattS


I don't know about everyone else but since I run a diesel if I stopped at the first click every time I would never be filling the tank. Diesel foams bad when pumped. I usually get another 4-5 gallons after the first click. Let it settle a while and continue filling. :D

True.

Originally posted by MattS


I don't know about everyone else but since I run a diesel if I stopped at the first click every time I would never be filling the tank. Diesel foams bad when pumped. I usually get another 4-5 gallons after the first click. Let it settle a while and continue filling. :D


Sheesh, some of you are dense :p

The point is not specifically the "first click", the point is to pick a method that gets you the most consistent refils of the same volume of fuel :flipoff2:


Do you need a diagram? :p

Originally posted by DRM
Sheesh, some of you are dense :p

The point is not specifically the "first click", the point is to pick a method that gets you the most consistent refils of the same volume of fuel :flipoff2:


Do you need a diagram? :p

How about you buy a diesel and fill it up over 60,000 miles like I have and then come back with a clue.

Depending on ground temp, air temp, volume of the pump (big rig or smaller regular sized nozzle), filtered at the hose or not, adding fuel supplements or winterizer, and last but not least brand of truck (Dodges fill up fuller than Fords) you never really know how much fuel your putting in unless you spend the extra time to top it off.

What I'm saying is, every fillup can/may be different. There is no method of consistency but topping it off till you see fuel in the filler neck.

Do you need a diagram? Or should I take a picture? :flipoff2:

Originally posted by MattS

There is no method of consistency but topping it off till you see fuel in the filler neck.

Do you need a diagram? Or should I take a picture? :flipoff2:


Maybe you should try READING the text you just quoted, and you will see who is lacking in the comprehension department :rolleyes:


The point is not specifically the "first click", the point is to pick a method that gets you the most consistent refills of the same volume of fuel


Now, what part of that was so hard to understand, that you felt the need to AGREE with it in your reply you THOUGHT was disproving it? :p


Maybe I should have just drawn you the diagram and not even asked :D

Originally posted by DRM
Now, what part of that was so hard to understand, that you felt the need to AGREE with it in your reply you THOUGHT was disproving it? :p


Maybe I should have just drawn you the diagram and not even asked :D

What part of "There is no method of consistency but topping it off till you see fuel in the filler neck." Did you not understand?

Originally posted by MattS
no method of consistency but topping it off till you see fuel in the filler neck

Wow, that sounds an awful lot like:

pick a method that gets you the most consistent refills of the same volume of fuel


:flipoff2:

(Starting to draw diagram as last resport) :p

well dang, this makes me feel better about my 9.3 mpg towing the jeep with my 460 :D

real #s over 20k miles, 17 mpg mostly highway, empty. 12 to 13 mpg towing 36' bumper pull with cabover in truck 28 to 30k total weight at 65 if i push it to 70-75 i have got as low as 8. 97 dodge 3500 4x4 ex cab dually. 220k on it right now

Originally posted by DRM


That works too.




Basically, unless you can physically see into the tank, you have NO WAY of knowing if you are putting the same amount of fuel into the tank at every fill up. You are solely reliant on the fuel shut-off sensor.

"topping off" generally means you have the punp set to auto, then it "clicks" off when the sensor tells it to. Now, if you always add another .75 gallon after that first click, then you are fine. But if you click, then click again, then again, and nex ttime you don't, then next time you click till it is spilling out the filler neck - then you are NOT getting consistent readings on how much fuel you are using.

Because of that, the easiest method is to always just stop pumping with the first click of the sensor. Yes, the sensors at different pumps may have a different reading, but you gotta work with the system you have :)

Anyway, in short: if you top off the same volume of fuel after the first click each time, then you are doing the same principle I was operating under when I said "don't top off". i top mine off everytime,but it won't be the same if the parking lot is unlevel.even when the auto shut off stops it...

Originally posted by wheatfield
I have an 03 HO 6spd Cummins 3.73 3500 dually Edge EZ (set on level 2) AFE intake full 4" exhaust. I just got back from Moab on Tuesday and got 12.7 mpg average, I set the cruise at 77 mph on the flats and ran 60 up the passes. I tow a 12' inclosed trailer for work around town and I get 14.5 to 15 mpg. The truck know has 7800 miles on it.

Scott

Edit: Gross weight was about 16K hey scott,were you in moab over the laborday weekend.i was there fri.to sunday...

anyways,back to mpg i just towed to moab and back going through colorado over monarch pass.i only got an avg.of 10.5 mpg.i have a 2400lbs gooseneck,toyota,2 4-wheelers and lots of camping gear.not very good,i may buy a carhauler to tow the rig on.

my truck is a 2001 f-250 psd,auto,3.73 gears,2-wd crew cab...

Makes me love my V10.. 9-10 towing like a mad man constantly.


RK

sounds like soemthing is wrong with your PSD. A few of my buddy's all have PSD's and they have no problems, and they kick everybody's ass. They will hit the governor no problem pulling bronco's, and jeeps, and all that good shit like that.

I get 15-16 combined, 12 towing 7000#. Anything over 10 mpg in a fullsize truck is like a dream come true to me. Most people lie about fuel milage and penis size:D