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6.7L Power Stroke Diesel 2011-current Ford Powerstroke 6.7 L turbo diesel engine

Crazy Question? Maybe

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Old Oct 27, 2018 | 11:41 AM
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Crazy Question? Maybe

Is there anything someone could do to a Powerstroke that would prevent it from using any DEF? Not talking about deleting, or maybe I am? My situation is since I bought my 2011 6.7 Lariat, the DEF message has been at "Below 1/2 Full". I have only driven it 2,000 and change since purchase. I did see when regen cycle start. I can't recall seeing it finish, but it might have. I don't tow, just normal city and highway driving. Just curious. I haven't filled the DEF because I wanted to see how long it would last etc. I seem to have the stock tailpipe etc. Should I be worried or does it last like 5,000 miles or something?
 
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Old Oct 27, 2018 | 12:53 PM
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A tank of DEF will last about an oil change interval, so about 6k or so depending on how much you work the motor.

As for the regen, with 2k miles driven, your truck has seen a minimum of 4 regens (mandatory every 500 miles) but with highway/city driving and no towing its done probably around 8. The regen message pops up and disappears quickly so most don't even notice it.
 
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Old Oct 27, 2018 | 03:22 PM
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message should not come up every time you drive it for the DTE on the DEF until you are at 500 miles or less.

My self I would not even bother monitoring it until you see that 500 until empty and even then I would not fill until the 200 mile mark.

You get plenty of warnings.
 
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Old Oct 27, 2018 | 07:24 PM
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I cannot tell from the way your questions are phrased but read up and don’t confuse the DEF system with Regeneration. They are somewhat separate systems.
 
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Old Oct 28, 2018 | 12:13 AM
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Ok thank you. Just me being a little paranoid. Last diesel I owned had no DEF and none of this BS.
 
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Old Oct 28, 2018 | 03:56 AM
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Not towing, you will get about 1000 per gallon of def. as others have said, if you fill when oil gets changed, you can refill it at next oil change. Its really nothing to worry about.
 
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Old Oct 28, 2018 | 10:35 AM
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Originally Posted by eastcoastweb
Is there anything someone could do to a Powerstroke that would prevent it from using any DEF? Not talking about deleting, or maybe I am? My situation is since I bought my 2011 6.7 Lariat, the DEF message has been at "Below 1/2 Full". I have only driven it 2,000 and change since purchase. I did see when regen cycle start. I can't recall seeing it finish, but it might have. I don't tow, just normal city and highway driving. Just curious. I haven't filled the DEF because I wanted to see how long it would last etc. I seem to have the stock tailpipe etc. Should I be worried or does it last like 5,000 miles or something?
I been wondering that too. Could you have a tuner or some other way of "fooling" the system to think that there is plenty of DEF fluid but not have it use any?
 
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Old Oct 28, 2018 | 02:27 PM
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Originally Posted by tradosaurus
I been wondering that too. Could you have a tuner or some other way of "fooling" the system to think that there is plenty of DEF fluid but not have it use any?
By doing that, odds are the DPF would plug up in no time.
 
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