Thank you for the reply. I have just recently put bigger tires on the truck. What is the best way about getting this done if you do not feel comfortable doing it yourself. What do you think it would cost? Will ford do it? Will this destroy the warranty?

and yes I am waiting for my N-fab bumper to be delivered hence why i dont have one right now

 

About to re-gear from 3.31 to 4.09/4.10. Any reason why I shouldn't?

See this thread for starters. Search the forum (or better yet Go0gle) F150 ring and pinion swaps. I have to save some dough for not only a ring and pinion but also for a locking diff of some type (I have a couple in mind) as well as for the labor costs of an install. It's going to be well into '18 before I can get any of this done with my truck. Meanwhile, I stayed conservative with my aftermarket tire and wheel choice in order to best preserve my truck's factory performance.

Good luck!

 

 

I wish I could get it. I have a 15 so it wont work, but others now know thanks to you. I find Waze to work well in my area.

 

2010 screw with 5.4 and 92,000 miles. I've owned the truck about 14 months. And I've run an assortment of Flex fuels.

First run of any length I got about 16 mpg. Changed plugs, cleaned all sensors and anything else I could spray and wipe.

Most recent run was 600 round trip mostly flat interstate (70/65 mph) and running AC in low 90 temps. I got 19 mpg. I'm pretty happy with that.

 

I purchased in 2011 the 2004 (new body style) 5.4 liter F150. The mileage has been calculated since day one with odometer and pump readings. 13.58. Miles at start 71890.
Miles today 118665. Note I didn't tow much until this year. This year's average is 12.10.
(nice to just focus on your max mileage highway trip, makes you warm and fuzzy, real numbers a lot less).

 

Back in 2010 when I bought my truck new I bought an ARE camper shell painted lava to match my truck because at the time I had three wolf hybrids I needed to cart around from time to time, they were a family, Mom, Dad and their baby, over the years they sadly have all passed away and I recently removed the camper shell as it was not longer needed. A while back and two homes ago I made a storage system for my camper shell consisting primarily of three 2x4s and six ratchet straps along with 12 lifting eyes and currently the shell hangs from my barn roof out of the elements and out of the way.

Prior to removing the shell I was averaging 16.1 MPG and recently I have achieved 18 MPG and climbing until I decided to change my antifreeze which killed my mileage with all the idle time required to do the flush.

If you are carting around a camper shell for no reason remove it and you'll most likely experience better than a 10% increase in mileage. I also noticed that I tend to drive easier to maximize the benefit of hauling less weight and improved aerodynamics.

 

Been playing around with flex-fuel.
Minneapolis to Denver on e85 got 14mpg @ 70mph.
Towing a 6x12' UHaul back on e85 was 9.5mpg average.
e85, at local prices, anyways, has been about 1 cent/mile cheaper than 87 octane e10.

Lately, I've been playing around with e30, since there's a station on my commute that has it. Average MPG has been just over 16.5 for my 50 miles-a-day commute.
Cost per mile has been just over 11 cents/mile.

Regular 87 octane e10 would have to get me over 21mpg to be worth it, and that's not going to happen.

 

I think that is the right way to evaluate it. $ per mile. I am not aware of any other upside/downside to alcohol. It does absorb water but if the fuel system is designed for it, there should not be a problem.

 

Watch tire pressure, I keep mine 2 PSI over, use the lightest oil specified for your vehicle, 5w20 or in some cases 0w20 (winter), avoid long periods of idling ("fast" food lines are horrible for mileage, go inside), avoid long warm ups in the winter just one to two minutes (5 minutes in cases of extreme cold) and drive easy the first few miles depending on temperature, keep injectors clean, keep air filter clean, clean your throttle body and mass airflow sensor clean, of course a well tuned engine (plugs and coils) is paramount, engine friction reducers like Slick 50 or Motorkote might help (can't hurt). I get slightly better mileage with Premium over Regular but not enough to justify the $0.60 per gallon price increase. I put 4 ounces per ten gallons of gas Marvel Mystery oil when I fill up and run Chevron with Techron from time to time to keep my injectors clean. Driving habits probably have the most impact, avoiding stop and go traffic is probably #1 in improving mileage but that should be obvious when you look at your vehicles city/highway mileage ratings. At the end of the day we all drive trucks as either a primary or secondary vehicle and they aren't noted for fuel economy but rather practicality, just using a little common sense and maybe consider a gas sipper as a second vehicle, I appreciate there are other economy minded people looking for ways to improve mileage but I'm still waiting for that magic bullet to get my 5.4L F150 up over 18 MPG.