you are posting the 6.7L forum. Is this what you are running? It would help for some reasonable feedback for you to tell us what you have and what mod's you have already done.

BTW, welcome to the site. A lot of helpful folks hang out here.

 

 

The truck will tow 20,000 pounds without any problems at all. Adding a tuner will only use more fuel because you cant have more power without adding more fuel. Which means less fuel millage. All these people telling everyone that i get better fuel millage and increased H/P is not telling the truth. Get rid of the tuner put the stock air cleaner back on the truck and your truck will thank you for it. I don't believe those K&N type filters do anything tor diesel motors because the induction is so much different than a gas motor. Everyone paid $8,000 for the diesel and right away they think they need a tune. Yet they don't go to a dyno to make sure the tune is safe in the first place.

 

If you have all of the emissions hardware and I read that you do, there is zero point to tuning these trucks. At a minimum, your engine is creating more soot causing more active regenerations as the PCM struggles to keep the DPF clean. An unhealthy engine and more active regenerations will significantly reduce per tank MPG.

 

 

Deleting your truck will not increase fuel millage at all. Wile during regens fuel millage does suffer a little during this process when it's done fuel millage goes back up. The process doesn't use that much extra fuel and no one here can tell you how much extra fuel is used during the regeneration process. The EGR systems on these trucks are engineered by people with deep pockets and years of experience. Hard for the average man to say taking that off my truck will help it in any way. Not sure why you want to spend the money to remove this stuff from your truck. It isn't just a matter of a block off plate anymore like the old days.

 

EGR and DPF delete, with a tow tune, will improve mpg about 2 mpg in a 6.7 compared to stock.

If towing, make sure you use a tow tune after delete (low hp incease). The tune you have now may be good after a delete. However, you don't need to delete to tow your load - should be able to tow it stock no problem. I'm guessing you got about 7 or 8 mpg towing 20K stock (I got about 9 mpg towing 14K stock, with my 2014 6.7).

Also, as stated above, if you don't delete, get rid of that tune and go back to stock tune.

 

 

You are getting some bad info here. I have a 2015 F350 6.7L and am bone stock EXCEPT for an SCT based DP-Tuner 35HP Tow tune. Not only does it substantially improve the driving experience, it also extended my regen intervals. So an emissions friendly tune is not pointless and can extend the life of the DPF by reducing the number of regens. My MPG was not affected at all.

 

The OP needs to consider the 2011 version of the 2015 SCT tune revision you are using (potentially at additional cost and still possibly different code) to see if it's tune related or OP possibly has other issues that need to be investigated. A 2 MPG loss after the tune is excessive and the engine doesn't seem healthy (return to stock to find out). Since your mileage between active regenerations are extended, I'm going to assume your EGT's are now higher than stock allowing for increased passive regeneration which could help the DPF. Your positive results read to me as having a healthy engine.

There are reasons to delete and tune a problematic truck but I don't understand the reason to add a tune to a healthy stock truck with the DPF in place. The pickup 6.7L is plenty capable on stock programming. The one exception I can think of is if someone is attempting to resolve/improve shifting with third party TCM firmware but that could cause negative results in other areas. For the 2011 job 1, the shifting anomalies are quite annoying. This is not a post to say you are wrong, just a discussion. Your results are opposite what I would expect. A buddy tuned (EZ LYNK, PPEI) his 2015 Duramax (yes, different engine, different design) with emissions components on and he had negative results with more frequent active regenerations (which reduced stock MPG).

 

Deleting and low HP custom tuning does have a high chance of increasing MPG by a minor amount. Such as less than 1 MPG but those results seem to vary. What deleting does not do is take a 14 MPG 8,500 lbs truck and turn it into a 25 MPG 8,350 lbs truck overnight. I don't believe those tales for a second.

 

For the OP: SCT is not known for good canned tunes. Most use them to install much better custom tunes. If you wanted a new SCT X4 with custom tunes, that is only $400 for the holidays from 5-Star including 3 tunes and they also make good tunes which also reduced my regen interval. You can talk to them to insure that their tunes will work with your model SCT device. I have tried the 5-Star tunes and found them to be fun and efficient, but I like my DP-Tuner tunes a little better. 5-Star tunes are more cost effective.

 

Mine came stock with a tow tune. it's called tow/haul mode. I have a 13,0003 5th wheel and i get 11MPG's towing across the country average.

 

I have a deleted 2014 F450 with the Tyrant SOTF tunes. in position 3/4, I get 13+/- MPG at around 70-75 and 12+/- MPG at 80-85, empty. Towing a loaded goose neck cattle trailer with tarp at 70-75, I get about 10.5 - 11 MPG. Since we've got the 4.3 rear end, you can't really compare mileage from the F450 to the other Super Duty trucks that are typically a 3.31, the gearing makes a big difference in fuel mileage.

Tunes don't make much difference in the towing feel with the F450 especially, you really only need them to either burn cleaner and reduce regens or if you delete.