Hey, y'all, new to the forum and wanted to thank you all for the magnitude of knowledge & experience you all share. I've learned tons about the F-150 all thanks to you! I'm hoping to put in an order for a Lariat PB 4x4 later this year. Will be my first truck!

With that, I didn't want to steal other peoples' threads on MPG and driving experience, but I've noticed overwhelming responses on the PB performance. From what I've seen, yes, it depends on how and where you drive. Because of this data, I'm starting to wonder what owners of the standard Ecoboost are getting on MPG. Any owners out there driving 21' 4x4 EB with either the 3.31 or 3.55 E-locking diff? What MPG are you getting? I haven't found much on my searches, seems all the rave is either on 5.0's, PB's, or PS.

I'm estimating city to likely be 16-18mpg, highway perhaps 19-21pmg, in real world driving???

Appreciate all the feedback and TIA

 

I doubt there is any difference in the 21 vs the 18-20. There are tons of threads on this in the 15-20 section and you can also check tracking sites/apps like Fuelly to see what averages are.

I don't think anybody who is honest is going to get 18 city mpg in a 3.5 EcoBoost (you didn't stipulate which EB). That would be higher than EPA on the sticker, and in the city, with a truck, that's rare. Not everybody has the same definition of "city", thought, and sometimes people like to cherry pick.

You also have to account for how many people modify their trucks, even if it's just larger or heavier tires, that can make a big difference (2+ MPG) alone.

You're going to want to search a bunch of threads and get aggregate numbers from sites/apps like fuely, you'll never get a representative sample from a single thread like this

 

I don’t calculate my mpg by hand or use an app, and blkz28spt makes perfect sense. That being said, my personal experience is roughly 19mpg avg over the 9500 miles I put on my truck according only to the in dash calculation. I use trip 1 as the life of the truck and trip 2 for any long trips I want to see an average for. Best avg on an all highway trip was 23mpg.

Considering the Toyota Highlander that I replaced with my truck got 20.5mpg, I’m very happy with my truck.

 

I learned this the hard way. wife just got an rx350 (highlander) and its terrible on fuel for what it is. we get the same as you did, dash says 21mpg.

 

Toyota in general uses old powertrains that have low horsepower, low torque, low mpg

 

I have a 3.5L EB with 3.55 rear end and am getting 17.9mpg on my current tank (almost empty). This is all city driving and only my 2nd tank since I picked it up in September. The first tank got around 18.5mpg around town.

 

If you don't mind my asking, what town?

 

Nashville, TN

 

Rookie mistake on my part. You read correctly on my assumption. I was referring to the 3.5 EB. Appreciate the insight, I’ll take a look into the 15-20 forum too.

My thinking is: Is the PB worth getting for ~$1500 more (over standard 3.5 EB) for the added power, slight efficiency gains, and added pain/failure points.

 

Only you can decide how much the power and generator are worth to you.

How much you gain in mileage seems to mostly depend on the type of driving you do. Comparing my 2019 3.5 Eco to a 2021+ Powerboost, all else equal, the EPA city mileage literally goes up by about 50%, from 17 to 24. So if you're getting 17-18 around town in a truck that probably stickers at about 17 city, it stands to reason you could expect to get closer to 24 with a powerboost...that's a huge difference. To put numbers on it, if/when you drive the truck 50k miles, at just $3/gallon for gas, 17 MPG costs $8,823 whereas 50k miles at $3/gal and 24 MPG costs $6,250. That's a $2,473 savings in fuel price after just 50k miles at merely $3 gallon average...probably about enough to pay for a Ford factory ESP/extended warranty from an dealer (flood, ziegler, whomever)...and as gas prices go up as they probably will you'll save even more...as you drive farther you'll save even more...and that ESP is transferable and refundable.

Seems like a win-win-win to me.