Sorry if this has already been asked before. I am new to the site and also new to owning a diesel. I bought a 2013 F-350 two days ago.

Is there any mods that can be made to increase fuel economy without voiding my warranty? Someone told me I could increase the size of my exhaust pipe, another suggested replacing the factory muffler. Not sure if these are wives tales or not. Diesel is a whole new world for me.

Thanks

FH

 

Neither of those things will get you noticeable increases in MPG.

Post in your engine specific forum for better responses.

 

im not sure on warranty on the truck but i did the zoodad mod, airfilter and exhaust and increased my mpg by 7 to a gallon

 

7mpg is a good improvement, I guess I need to talk to the dealer. I would hate to compromise my warranty. Specially since I invested in the extended warranty...lol.

Thanks again.

 

that would be your best bet, you can however use diesel power additives and increase economy a little, i run 2 3.4 oz bottles of 2 stroke oil and around 16 ounces of the grey bottle of diesel power service

 

Firehawk, I've moved your thread to the 6.7L Powerstroke Diesel forum where you should get a better response.

 

Welcome and congrats on the new truck Fisherhawk. Give the engine time to break in and hand calculate your fuel mileage from fill up to fill up. Driving habits, idle time and road conditions all effect what each owner will see on MPG.

 

Yeaaahhhh...I definitely don't buy that one at all. It's just not possible. You're basically saying that a 6.7L truck would get 25 MPG on the highway with intake and exhaust mods?

Nope.

 

Zoodad isn't even possible on a 6.7 and even on the 7.3 and 6.0 trucks where it was possible, proven MPG gains were negligible. The biggest thing it gained you was a plugged air filter when driving during a snow storm!

There is no "free lunch" with the 6.7. Fuel additives help, but will not post large gains. Your best bet is to pay attention to the in dash mileage coach and improve your driving style to yield the best economy. Do not let the truck idle unless absolutely necessary. Idle time kills MPG since you are gaining no miles while you are still burning fuel. Learning tricks like letting off the pedal as far away from an approaching stop sign, curve or red light will increase economy as well.

Changes to the air intake system or the exhaust system on the 6.7 have not proven to provide any gains. There isn't much of the exhaust system that you can mess with anyway. Any back pressure provided by the exhaust system is dictated by the DPF and not any of the components that you can alter (unless you tune it and delete the DPF). If you are willing to step outside the protection of your warranty, tuning and deleting the emissions equipment seems to provide the best MPG gains, but it will cause you all kinds of warranty issues if you ever have engine trouble.

 

And if you tune and delete more then likely you will put your foot into it even more and not gain any mpg..

I tuned my 7.3 yrs ago but then my foot got a lot heavier and I was actually getting less mpg.If you can keep a light foot mpg will increase.But you can increase mpg in stock mode with a light foot.

 

I would expect marginal gains if any, even with a DPF delete.

 

If you could throw on 2k worth of mods to get 7 mpg without voiding your warranty.....don't you think Ford would have already done that?

Tread lightly here. Pretty much any serious modification to the intake or exhaust pre dpf is going to send you into no powertrain warranty land quickly. Its not lonely there, but its expensive.

 

First I would spend some time with the truck in pure stock form. You may find that you love it just the way the factory gave it to you. And if you later choose to do some aftermarket add on items at least you have a base line to calculate any improvements from.
Now if you just in the mood to spend some money on your new truck may I suggest a clean glass jar to be used for draining diesel from your fuel filter at least once a month to check for any water in the fuel.

Maybe then go ahead and order a lower replacement housing for the frame mounted fuel filter which have a history of being over tightened from the factory and can crack when being removed.

It never hurts to have an extra fuel, oil and air filter laying around in the garage for the unexpected.

Pick up a jug or two of DEF (diesel exhaust fluid), better to have it that to be shut down on the road because you forgot to top off the tank.

A ScanGaugeII is a nice aftermarket item. It in of itself will not increase your MPG, but the information it provides could help you to alter your driving habits, which could lead towards better MPG.

I run Power Service fuel supplement in every tank and average an increase of 1 MPG or better by doing so.

 

My truck is deleted, and I notice negligible mpg gain, probably because of the symptom rtazz17 described

To be honest, if you want to improve your mpgs, the best things you can do:
Vehicle maintenance - ensuring you replace air/fuel filters at recommended intervals, along with oil changes etc. Keep tires at 65+psi. You may see gains with using a fuel additive (you may not too...)
Driving - very gentle acceleration, and keep your speed down. I notice a substantial difference in mpg if I keep it around 1500rpms, instead of 1700+rpms.

 

Back when I spent a lot of time on the V-10 forum here, the question was asked very often of how do you increase the MPG. The most offered answer was to press down on the gas pedal as though there was a baby kitten under the pedal.

Never worked for me......but then, I not a cat person either.

Moral of the story is that sometimes a situation is what it is, you can accept it or complain. But, complaining gets old very fast, so your best to accept if for what it is.