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Old 01-03-2016, 01:09 AM   #57
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are you driving with the 4x4 engage or 2x4 at 70mph?
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Old 01-03-2016, 01:21 AM   #58
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Originally Posted by streamer_a View Post
I did a test this afternoon. Me and a 90lb German Shepherd. Otherwise empty truck. Fairly flat I-80 in Iowa. Engaged cruise control ~70mph, reset the computer, sat for 45 minutes. Result attached.

13.6 mpg.

Truck window sticker attached.

Weird. Speed related clearly.
Hmm... 4WD KR. Didn't the '13 KR have the "4A" setting like the current series? I wonder if your truck is never fully disengaging the clutch packs that manage the 4WD system and causing more drag than it should be when you're in 2H.
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Old 01-03-2016, 02:14 AM   #59
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Quote:
Originally Posted by streamer_a View Post
I did a test this afternoon. Me and a 90lb German Shepherd. Otherwise empty truck. Fairly flat I-80 in Iowa. Engaged cruise control ~70mph, reset the computer, sat for 45 minutes. Result attached.

13.6 mpg.

Truck window sticker attached.

Weird. Speed related clearly.
Hi, I think something is wrong with your truck; Mine gets about 10.8 MPG while towing a 6,300 lb rated 25' Airstream. Just generally driving around, I get about 16.5 MPG. On a freeway test, [reset mileage computer] going 65 and 70 MPH I was getting around 20 MPG. [This was only about 40 miles on the freeway with slight ups and downs. Not really hills]

Seems like a lot of people are getting quite a bit better mileage than I do, but they have 3:55's or 3:31's compared to my 4X4 with 3:73's. And they might drive slower than me too.
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Old 01-03-2016, 10:02 AM   #60
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Originally Posted by spencerhut View Post
Please don't call me a liar. I'm driving this truck, not you. I know exactly what it is getting for fuel mileage. I am the person putting the fuel in the tank. I'm probably just a much better and more careful driver than you are.
For what its worth here is my 2 cent worth
I drive a 2012 F-150 Platinum with 36 gl tank Ecoboost. HD Tow 3.7 rear with 76,000 Miles. The last couple of years strictly used for towing. AS 2013 - 30' International.
Around town in FL and IL average mileage 15.2 without trailer.
At 70 Mph no trailer cruise control set average between 17.0-17.5.
Same conditions at 80 Mph it drops to between 15.5 to 16.
Towing flat country at 65 to 67 Mph it is 10.5 mpg. Cruising at 70 to 72 Mph
(this seems to be the sweet spot 2,000 RPM) it is around 9.0 to 9.5 mpg.
The grade of gas doesn't seem to matter although I use mid-grade when towing. I experimented early to see if I could get the advertised 21 Mpg, on a flat road in southern Illinois at 50 miles mpg no stopping just rolling, I was able to coax 20.5 but that is not possible in normal driving. As soon as you have to stop at a stop sign and restart it drops drastically.
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Old 01-03-2016, 10:59 AM   #61
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Originally Posted by DKB_SATX View Post
Hmm... 4WD KR. Didn't the '13 KR have the "4A" setting like the current series? I wonder if your truck is never fully disengaging the clutch packs that manage the 4WD system and causing more drag than it should be when you're in 2H.
It does have a 4A option. My test was in 2H. Your idea is a good lead for me to follow up.
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Old 01-03-2016, 01:28 PM   #62
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Tire Inflation

Been reading the discussion regarding MPG of the EcoBoost. To state the obvious but often times overlooked, tire inflation may explain some of the difference between fuel economy of the same trucks. It's is easy to assume the tires are up to full inflation but not always the case. Rear axle ratio matters as well as you all know.

In my 2013 Owners Manual it states:

3.5L V6 EcoBoost engine “Regular” unleaded gasoline with a pump (R+M)/2 octane rating of 87 is recommended. Some stations offer fuels posted as “Regular” with an octane rating below 87, particularly in high altitude areas. Fuels with octane levels below 87 are not recommended. Premium fuel will provide improved performance and is recommended for severe duty usage such as trailer tow. Do not be concerned if your engine sometimes knocks lightly. However, if it knocks heavily while you are using fuel with the recommended octane rating, see your authorized dealer to prevent any engine damage.
-------

It also states:

Calculating Fuel Economy

Do not measure fuel economy during the first 1000 miles (1600 kilometers) of driving (this is your engine’s break-in period); a more accurate measurement is obtained after 2000 miles–3000 miles (3200 kilometers–4800 kilometers). Also, fuel expense, frequency of fill-ups or fuel gauge readings are not accurate ways to measure fuel economy. 1. Fill the fuel tank completely and record the initial odometer reading. 2. Each time you fill the tank, record the amount of fuel added. 3. After at least three to five tank fill-ups, fill the fuel tank and record the current odometer reading. 4. Subtract your initial odometer reading from the current odometer reading. 5. Calculate fuel economy as follows: Standard: Divide miles traveled by gallons used. Metric: Multiply liters used by 100, then divide by kilometers traveled. Keep a record for at least one month and record the type of driving (city or highway). This provides an accurate estimate of the vehicle’s fuel economy under current driving conditions. Additionally, keeping records during summer and winter show how temperature impacts fuel economy. In general, lower temperatures mean lower fuel economy.

I guess that even Ford is saying don't trust the dash for an accurate fuel economy reading.

"Loving the new normal" price of fuel..
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Old 01-04-2016, 11:57 AM   #63
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Meant to chime in earlier, but got sidetracked. I have a 2012 F150 EB 3.5, super-crew cab, 6.5 bed, and 3.15 rear end; yes, I opted for the higher gearing as I do a lot of highway travel w/o towing. Don't have the AS yet, but am pulling a Funfinder (25' overall), empty weight around 4300#, and probably 5000 or so when actually towing. I have a shell on the trucks as well.

I love the truck and love the engine; I have about 63K on it with no mechanical issues of any kind. Typically I get about 14-15 around town, 16-17 with some highway mixed in, 18-22 on the open road (generally always carrying two to four paddleboards on roof racks), and seem to get exactly 10mpg towing the trailer, no matter where I tow it. Most commonly I pull the trailer from Sacramento, CA to Port Townsend, WA, so lots of mountain driving! There isn't a grade I've encountered that I couldn't cruise uphill at 70+mph if I wanted; however I generally tow at around 60 or so.

Larry
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Old 01-04-2016, 12:38 PM   #64
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Any diesel owners out there doing any better?
Yes.
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Old 01-05-2016, 10:01 PM   #65
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Yes.
That was a completely worthless response.

Details please . . .
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Old 01-05-2016, 10:05 PM   #66
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Went ahead and replaced the 2013 F150 with a 2015 F150. Basically the same truck, just 93k less miles. The old truck was good to us and I hope the new one does just as well.
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Old 01-05-2016, 10:12 PM   #67
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That was a completely worthless response.

Details please . . .
Lance has already shared extensive insight on his RAM 1500 EcoDiesel.
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Old 01-05-2016, 10:44 PM   #68
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Lance has already shared extensive insight on his RAM 1500 EcoDiesel.
Perhaps stating such would be useful, as opposed to the "yes" with zero other information. But thanks for assuming I should have had some sort of psychic connection with him.
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Old 01-05-2016, 11:12 PM   #69
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Perhaps stating such would be useful, as opposed to the "yes" with zero other information. But thanks for assuming I should have had some sort of psychic connection with him.
You're welcome to be snide if you like, but it's easy to find the set of threads that a forum member has started by going to their profile, under "Statistics" there's a link labeled "Find all threads started by <username>"
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Old 01-05-2016, 11:19 PM   #70
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You're welcome to be snide if you like, but it's easy to find the set of threads that a forum member has started by going to their profile, under "Statistics" there's a link labeled "Find all threads started by <username>"
Yes, and I certainly sould have known to do that based on the "Yes". I mean what fool would not?
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