Ecoboost MPG
Logistics Pro
Joined: Jan 2001
Posts: 3,740
Likes: 37
From: Central NYS
Pumps are accurate. The variable is how full you filled the tank. Figure the average MPG over 5 or 6 tankfills will minimize that variable.
Cargo Master
Joined: Apr 2010
Posts: 3,274
Likes: 4
From: Seattle area
My 17-mile commute ranges from 19mpg when I'm hauling in the left lane at 70mph to 22+mpg when I hold it at 60mph in the right lane and let semi's pass me. If it's raining and I hold at 60mph, my mileage drops to around 20mpg. This is measured from my driveway to my parking lot at work, including traffic lights. Furthermore, my numbers are a ten-run average (yes, I'm that **** with my numbers; I'm an engineer...and, well my commute is boring).
My point is... A few tenths + or - based upon when the pump clicks will not impact any real world estimates. There is too much variability in our normal commute.
Tuned
Joined: Jan 2013
Posts: 369
Likes: 16
From: Pleasant Grove, Alabama
There is a large difference in the way my 2016 fills versus the way my 2012 filled. The 12 would always accept more fuel after it clicked off. I've worked up to a gallon in it after it clicked off. The 2016 is full when the pump clicks off. Full. With the 12 it was fairly easy to run it up to the next even dollar. I quit when the pump clicks off filling the 16. Given that, with my truck, I don't think the pump makes a difference.
Moderator
Joined: May 2005
Posts: 8,216
Likes: 1,231
From: San Antonio, TX
Not a good idea to keep filling it after it clicks off. If fuel backs up into the carbon canister, the tank won't be able to vent anymore. Then you'll get other fueling problems, like an erratic idle, strong fuel odor, poor fuel mileage, etc along with a check engine light.
Cross-Country
Joined: Oct 2011
Posts: 82
Likes: 1
I have a 16 screw 2.7 with 3.55. I live in the pittsburgh pa area and am not far from the Ohio line. I notice when driving in pa during my normal day to day driving I get anywhere from 18-20 mpg mixed highway and city doing 65-70 on the highway. What I did notice though is when I drive in Ohio I get way better mileage anywhere from 21-25. The main thing I see is in western pa we have a bunch of rolling hills so even on the highway you are constantly going up and down where as in Ohio it's more flat so I really think things like the geography of your area along with speed and other factors like the load you are carrying. I'm really happy with my choice of the 2.7 I think it's a good combination of power and fuel economy. I think in my general area the difference in geography from one place to the next really affects my mpg.
Laughing Gas
Joined: Mar 2004
Posts: 1,019
Likes: 6
From: Fountain Valley
Our 2013 Max-tow has 3.73's and just averaged 22 on a 3K trip not towing. It has 40k miles and a 6.5 bed 2WD.
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Mountain Pass
Joined: Nov 2016
Posts: 205
Likes: 22
We just took a couple of days out in Ohio's Amish Country for a little get away (tough to get time off these days). I decided to take the truck and see how it does. 2016 Lariat extended cab 2.7 eco with 3.55's. We only put 511 miles on the truck total for the trip (I said it was a little get away) and, after figuring everything out, we averaged 21 MPG. That's great in my book. Some of you are doing even better. I'm convinced that the brand of gas has something to do with this. Someone I know with a 3.5 eco told me that the gas I normally use is no good for mileage. He said he switched to another brand and his MPG's took a 2 to 3 MPG jump up. While I was quite happy with 21 (old truck only ever reached 18 once during the years I owned it), I do plan to switch brands as he suggested and see what happens.
New User
Joined: Aug 2010
Posts: 8
Likes: 0
2015 2.7, 3.73 e-locker, 4x4, S crew, XLT 302a, 5.5 bed w/hard tonneau. currently at 62K.
with an average of 500 lbs in the bed, I averaged 20.6 mpg over 45K miles. I also keep all fuel consumption on an Excel spread sheet.
Typically my speed is 55-65 depending on the roads. Mostly 2 lane country roads in SD, NE & IA.
On a couple trips to MI & WI I have averaged 25+mpg on a 2500 mile trip. These trips were on mostly 55 mph roads. The speed really makes a difference in the mpg.
with an average of 500 lbs in the bed, I averaged 20.6 mpg over 45K miles. I also keep all fuel consumption on an Excel spread sheet.
Typically my speed is 55-65 depending on the roads. Mostly 2 lane country roads in SD, NE & IA.
On a couple trips to MI & WI I have averaged 25+mpg on a 2500 mile trip. These trips were on mostly 55 mph roads. The speed really makes a difference in the mpg.
Cargo Master
Joined: Apr 2010
Posts: 3,274
Likes: 4
From: Seattle area
We just took a couple of days out in Ohio's Amish Country for a little get away (tough to get time off these days). I decided to take the truck and see how it does. 2016 Lariat extended cab 2.7 eco with 3.55's. We only put 511 miles on the truck total for the trip (I said it was a little get away) and, after figuring everything out, we averaged 21 MPG. That's great in my book. Some of you are doing even better. I'm convinced that the brand of gas has something to do with this. Someone I know with a 3.5 eco told me that the gas I normally use is no good for mileage. He said he switched to another brand and his MPG's took a 2 to 3 MPG jump up. While I was quite happy with 21 (old truck only ever reached 18 once during the years I owned it), I do plan to switch brands as he suggested and see what happens.
I think most folks generally overestimate their MPG differences either by ignoring other changes in their driving or using a very small sample size. But eliminating all of that, I can only think of two reasons why your friend saw a big difference. One would be their engine was very dirty and they were using non-Top Tier fuel. They switched to Top Tier fuel and the cleaning additives removed enough gunk over a number of tanks to make it run more efficient. Another option is they're running a performance tune that needed a higher octane to improve performance.
Last edited by onug; Aug 17, 2017 at 08:49 PM. Reason: Spel chek x2
Mountain Pass
Joined: Nov 2016
Posts: 205
Likes: 22
You won't see a MPG change related to the brand of gas you use. MPGs are directly related to the amount of energy in a gallon of gas and all our gas comes from the same place. Once oil is refined into gas it's added to a national pipeline and mixes with gas from every other refinery. When it's removed locally for distribution, the tanker company add's the proprietary additives specific to the fueling station. The brand of gas you buy only pays for their specific fueling cleaning additives.
I think most folks generally overestimate their MPGs differences either by ignoring other changes in their driving or using a very small sample size. But eliminating all of that, I can only think of two reasons why your friend saw a big difference. One would be their engine was very dirty and they were using non-Top Tier fuel. They switched to Top Tier fuel and the cleaning additives removed enough gunk over a number of tanks to make it run more efficient. Another option is they're running a performance tune that needed a higher octane to improve performance.
I think most folks generally overestimate their MPGs differences either by ignoring other changes in their driving or using a very small sample size. But eliminating all of that, I can only think of two reasons why your friend saw a big difference. One would be their engine was very dirty and they were using non-Top Tier fuel. They switched to Top Tier fuel and the cleaning additives removed enough gunk over a number of tanks to make it run more efficient. Another option is they're running a performance tune that needed a higher octane to improve performance.
Fleet Mechanic
Joined: Jul 2010
Posts: 1,574
Likes: 2,517
From: Pittsburgh
Ecoboost Milage
Another Pittsburgher here : my average around town is 14mpg . Highway is around 18 . I believe it would be better if we didn`t have the summer blend gas to combat air pollution . when i go east to the area around Altoona milage goes up by 2 MPG. 2013 3.5 Ecoboost Fx4 CC 3.55 with 145" wheel base
Cargo Master
Joined: Apr 2010
Posts: 3,274
Likes: 4
From: Seattle area
All very good points. I don't believe he is running a tune of any kind. He has installed catch cans but that wouldn't have anything to do with this. Coming from a Tacoma to a 3.5 eco, I doubt a performance tune is even on his mind. He hasn't had the truck very long so I doubt the engine was very dirty. Just for giggles, I'm going to try his theory out and see what happens. I'll run through several tanks of another brand and report back. I work from home so it could be a while. On our trip, I used a brand of gas that isn't found around home and my mileage improved, however, that could have been with all the highway driving. It wasn't a big difference anyway. Regardless, I'm very happy with what I am getting.
06pghescape brings up some other good points. Gas with Ethanol will decrease your mileage, as will different seasonal blends. Plus the weather...any of these could be factors in your friend's MPG performance.
Senior User
Joined: Aug 2015
Posts: 319
Likes: 1
From: NKY
I agree. I've used numerous brands in our truck, Shell, Sunoco, BP, Mobil, SuperAmerica and Costco gas. I try to stay with the Tier One brands primarily and I've not seen any difference in mpgs based on brand. I've been running an 87 performance tune the last 2 months and believing my mpg's might drop a little, they have done the opposite. City we're getting 16 and highway has stayed in the 24 range. Off to a weekend of racing end of the month, curious what the mpg's will be towing.