Mpg
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Joined: Jun 2006
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Posting Guru
Joined: Jun 2006
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"soon as I put it in park it went to regen 1250 rpm so the next one someone tells me that my truck will not do that because it was hot from towing and the heat generated from the stress of towing the trailer will not go to regen then he is going to be insulted from me in this web site because this the segond time that this happened to me the first time was going up the grade about two month ago right in the the middle the speed dropped and the I felt I lost half of the power and now this trip as soon as pulled to refuel it did it. please do not ever think that you truck will not go to regen when it is working hard as it will it does not care and the fact that someone commented before that there is no way it will go to regen while working hard is false false false this the segond experience for me so I do not care wheather your are pulling 20k pound or going up 20 mile 10% grade the fact that truck is working hard very hard does not mean it is burning the soot in the cats and when the computer tell it clean up it will, not caring what the hell you are doing."
Not that it necessarrily applies to Ford's version of the 6.4, this is how International describes the regeneration process on their version of the engine in their new school buses;
Not that it necessarrily applies to Ford's version of the 6.4, this is how International describes the regeneration process on their version of the engine in their new school buses;
"WHAT IS REGENERATION?
Regeneration is the oxidation of soot particles in the diesel
particulate filter. There are two types of regeneration, passive and
active. Passive regeneration occurs when exhaust temperatures
naturally get hot enough to burn off particulates caught in the
DPF, cleaning the filter. Active regeneration is performed when the
exhaust temperature is not high enough to activate the process
of oxidation on their own. Fuel is injected into the exhaust system
and oxidized to increase the exhaust temperature and activate the
regeneration process in the DPF. Active regeneration can only occur
when the bus is above 20 mph."
particulate filter. There are two types of regeneration, passive and
active. Passive regeneration occurs when exhaust temperatures
naturally get hot enough to burn off particulates caught in the
DPF, cleaning the filter. Active regeneration is performed when the
exhaust temperature is not high enough to activate the process
of oxidation on their own. Fuel is injected into the exhaust system
and oxidized to increase the exhaust temperature and activate the
regeneration process in the DPF. Active regeneration can only occur
when the bus is above 20 mph."
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From: Hamilton, MT
Originally Posted by crazcorkath
In the summer I'm getting about 19 with mixed driving empty. 2001 srw 4x4 sc sb 6 speed with 3.73 rear. Only modification is K&N fipk.
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Senior User
Joined: Apr 2006
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From: San Diego, CA
Originally Posted by Admin
Cruise killed 2/4 MPG while you towed.....maybe even a bit more....
Having an engineering background, I'd want to see the data.
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Senior User
Joined: Apr 2006
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From: San Diego, CA
To help monitor fuel mileage, it'd be nice if Ford would give you the option for an instantaneous MPG readout on the dash like my wife's LEXUS as well as the average since you last pushed the reset.
I know it's not perfectly accurate, but directionally, having your current MPG would help.
As it stands now, I use it just for that seeing if I can get the display to give me an extra 10th towards the end of the tank. For me, I know I can reset for every trip, but I like to see what I'm getting off the tank.
I know it's not perfectly accurate, but directionally, having your current MPG would help.
As it stands now, I use it just for that seeing if I can get the display to give me an extra 10th towards the end of the tank. For me, I know I can reset for every trip, but I like to see what I'm getting off the tank.
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Joined: Jan 2003
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From: 3rd Rock
Originally Posted by mattebury
I don't know if I believe that. It may be true in hilly areas, but on the flat...
Having an engineering background, I'd want to see the data.
Having an engineering background, I'd want to see the data.
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From: Oregon
I have seen as much as .5-.7 mpg difference when using the CC vs not. I think the Admin is also adjusting his speed in relationship to the terrain and that will make a huge difference. I am comparing the steady speed CC VS steady speed not using the CC.
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From: 3rd Rock
Originally Posted by crazcorkath
That is not using the overhead console, by the way, and don't forget I am a female. If my son drives the truck it drops drastically!!
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In this month's issue of Diesel Power(DP) there's a comparison of the 6.8 L gas engine and the 6.4 L diesel. DP found that the difference in the cost of fuel would pay for the diesel in just under 4 years but they used 19.27 mpg in their test. After reading what's in this thread, I re-did the arithmatic using 16.0 mpg for the unloaded diesel milage and got that it will take a bit over 5 years using the diesel to break even on the extra initial cost of the diesel engine. I hope some of the mechanical wizzards here will commnet on this.
The other thing I noticed in DP is that there was a big difference between the estimated milage of some of the trucks with the same modifications. In one case it was 6.5 mpg the difference between Nick Disse's truck on page 132 and Scott Lellich's on page 133. That seems like a big difference in estimated mpg.
The other thing I noticed in DP is that there was a big difference between the estimated milage of some of the trucks with the same modifications. In one case it was 6.5 mpg the difference between Nick Disse's truck on page 132 and Scott Lellich's on page 133. That seems like a big difference in estimated mpg.
Lead Driver
Joined: Jul 2004
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From: Foothills, CA
Originally Posted by alremkin
In this month's issue of Diesel Power(DP) there's a comparison of the 6.8 L gas engine and the 6.4 L diesel. DP found that the difference in the cost of fuel would pay for the diesel in just under 4 years but they used 19.27 mpg in their test. After reading what's in this thread, I re-did the arithmatic using 16.0 mpg for the unloaded diesel milage and got that it will take a bit over 5 years using the diesel to break even on the extra initial cost of the diesel engine. I hope some of the mechanical wizzards here will commnet on this.
The other thing I noticed in DP is that there was a big difference between the estimated milage of some of the trucks with the same modifications. In one case it was 6.5 mpg the difference between Nick Disse's truck on page 132 and Scott Lellich's on page 133. That seems like a big difference in estimated mpg.
The other thing I noticed in DP is that there was a big difference between the estimated milage of some of the trucks with the same modifications. In one case it was 6.5 mpg the difference between Nick Disse's truck on page 132 and Scott Lellich's on page 133. That seems like a big difference in estimated mpg.
https://www.ford-trucks.com/forums/6...-hp-tests.html